Tom Harrison
tomh36.bsky.social
Tom Harrison
@tomh36.bsky.social
Football data analyst, ex Santos Laguna/Orlegi Sports

Writing Liga MX analysis in English- https://cambiodejuegoenglish.beehiiv.com/
Y en Español- https://cambiodejuego.beehiiv.com/
Pinned
✍️ Blocking the goalkeeper's sightline can increase goal probability

▫️Defensive positioning study with @statsbomb.com data

▫️Pressuring shots reduces goal probability

▫️If a defender can't pressure the shot they should move to clear the keeper's view

cambiodejuegoenglish.beehiiv.com/p/blocking-t...
Blocking the goalkeeper's sightline can increase goal probability
Analysis of defensive positioning and the impact of pressure on a shot
cambiodejuegoenglish.beehiiv.com
🧵 Luka Romero | Aiding his individual development

🔹 Analyzing his first year in Liga MX

🔹 4 suggestions of areas to focus on, in order to improve Romero's output, within Nicolas Larcamón's system

🔹 Data & graphics from Twelve Football

👇👇👇
January 14, 2026 at 4:33 PM
🧵 C.D. Guadalajara | How they can improve this Clausura 26 season

▫️ Chivas had a decent 1st season under Milito, finishing 5th in xPoints & reaching the quarter-finals

▫️ However, improvements are required to compete for the title

▫️ All data & graphics from Twelve football

👇👇👇
January 9, 2026 at 4:17 PM
🆕 ✍️ Five ways that Rayados can improve next season 👇

1️⃣ Better final 3rd penetration

2️⃣ Develop left-wing creativity

3️⃣ More on-ball quality in midfield

4️⃣ Better control of central zones when out of possession

5️⃣ Improve in defensive transitions

cambiodejuegoenglish.beehiiv.com/p/five-ways-...
Five ways that Rayados can improve next season
Analyzing opportunities for improvement from Domenec Torrent's side
cambiodejuegoenglish.beehiiv.com
December 31, 2025 at 3:32 PM
🧵 Blocking the goalkeeper's sightline: A factor in Aston Villa's xG overperformance?

📉 Aston Villa's current xG overperformance is rare, and seems unsustainable

❗ But, one concept partly explains their high number of goals from outside the box

❌ Blocking the goalkeeper's sightline
December 26, 2025 at 5:38 PM
✍️ Re-building Necaxa

▫️As part of the Twelve "Creator Collective", I used their graphics & models to profile possible signings for Los Rayos

▫️Key needs: better aerial & ball-playing center-back, a replacement for Palavecino & wingers for both flanks

cambiodejuegoenglish.beehiiv.com/p/re-buildin...
Re-building Necaxa
Analyzing the impact of hiring Martín Varini, their squad, and possible signings
cambiodejuegoenglish.beehiiv.com
December 23, 2025 at 7:38 PM
🥅 Are goal prevention metrics overrated when analyzing goalkeepers?

⬇️ Low season-on-season correlation when assessing goal prevention vs expectation

▶️ Appears comparable to finishing metrics, which can have a massive impact on results, but aren't that repeatable
December 18, 2025 at 6:44 PM
Reposted by Tom Harrison
I love this line of analysis. I literally designed the data set so that it could be pursued. I think we ended up a little more incomplete than I had hoped, but it was going to be filled in by aligned tracking in the SB Data Set.
December 17, 2025 at 3:34 PM
🧵 Thread: I recently looked into the concept of escaping pressure 👇

1️⃣ 3rd player, up-back combos are the most efficient at escaping pressure

🔷 I defined a press-escaping situation as a pass that found a free player (not pressured in 3 seconds), after 2 consecutive ball carriers were pressurized
December 17, 2025 at 3:18 PM
✍️ Analyzing escaping pressure & the passing combinations used to find a free player 👇

⬆️ Up-back 3rd player combos are frequently used & find a free player more than 50% of the time- clearly the most efficient

🔷 Harder to escape pressure out wide

cambiodejuegoenglish.beehiiv.com/p/up-back-3r...
Up-back 3rd player combos- The key to escaping pressure?
Studying press escaping, and why it matters for some teams
cambiodejuegoenglish.beehiiv.com
December 15, 2025 at 6:13 PM
Reposted by Tom Harrison
King Ant!
✍️ Armando "Hormiga" González: A 22-year-old reaching Erling Haaland levels of output

✅ Excellent off-ball movement to get in-behind defensive lines

✅ Attacking the blindside when Chivas cross

✅ Frequently adjusts positioning to gain advantages

cambiodejuegoenglish.beehiiv.com/p/armando-go...
Armando González is the best striker in Liga MX
Analyzing how "Hormiga" generates so many high-xG chances
cambiodejuegoenglish.beehiiv.com
December 11, 2025 at 8:05 PM
Reposted by Tom Harrison
Great writeup. I've been fascinated by how Hormiga has fit in the team's system this past season.
December 11, 2025 at 5:58 PM
✍️ Armando "Hormiga" González: A 22-year-old reaching Erling Haaland levels of output

✅ Excellent off-ball movement to get in-behind defensive lines

✅ Attacking the blindside when Chivas cross

✅ Frequently adjusts positioning to gain advantages

cambiodejuegoenglish.beehiiv.com/p/armando-go...
Armando González is the best striker in Liga MX
Analyzing how "Hormiga" generates so many high-xG chances
cambiodejuegoenglish.beehiiv.com
December 11, 2025 at 4:42 PM
✍️ Why Club América's attack isn't working

1️⃣ More crosses from deep & wide

2️⃣ More shots from distance

3️⃣ No replacement for Henry's combination of goals & creativity

4️⃣ Fewer runs into the box from interior midfielders

5️⃣ Too pragmatic in big games?

cambiodejuegoenglish.beehiiv.com/p/club-am-ri...
Club América's attack isn't working
Analyzing André Jardine's worst season with Las Águilas
cambiodejuegoenglish.beehiiv.com
December 3, 2025 at 6:05 PM
Pass and move 🏃

🔷 Whilst tracking data is needed to fully assess off-ball movement, we can visualize movement during a pass combo with event data

🔷 I split pass & move into 2 types:

1️⃣ Wall pass (1-2)

2️⃣ ABCA combo (Player A makes pass 1 & receive pass 3)

👇 Example from Messi at past 2 World Cups
October 31, 2025 at 5:04 PM
xG p90 leaders in Europe's "big 5" leagues plus Liga MX, 2025-26 (Data from FBref, minimum 500 minutes):

▫️ Erling Haaland - 1.03

🇲🇽 Armando "Hormiga" González - 0.75

▫️ Kylian Mbappe - 0.73

The 22-year-old should be Mexico's next export to Europe
October 27, 2025 at 7:43 PM
🧵 Thread: I recently explored a few ideas to analyze a team's press in more detail 👇

1️⃣ Pressing triggers

▫️By focusing on the opponent's pass before a 1st pressing action in a sequence, it's possible to separate different triggers

👇 The graphic shows an example, with the 8 triggers that I defined
October 24, 2025 at 3:20 PM
✍️ Pressing triggers, orientation & defensive positioning: Developing opposition analysis ideas 👇

▫️Focusing on the pass before a pressure to analyze triggers

▫️How the trigger impacts outcomes

▫️Orientation & positioning can add more layers of detail

cambiodejuegoenglish.beehiiv.com/p/pressing-t...
Pressing triggers, orientation & defensive positioning
Developing opposition analysis ideas & analyzing how pressing triggers impact outcomes
cambiodejuegoenglish.beehiiv.com
October 21, 2025 at 4:05 PM
Reposted by Tom Harrison
Welcome new people, here are some soccer analytics and tactics accounts to follow if you're into that
October 15, 2025 at 10:49 PM
2 goals for the extraordinary Gilberto Mora in the U20 World Cup yesterday.

Back in February, I profiled the 16-year-old, analysing his underlying numbers, remarkable ball retention, shot locations and performances in the Tijuana academy 👇

cambiodejuegoenglish.beehiiv.com/p/the-best-p...
The best prospect in Mexican football?
Analyzing Gilberto Mora, in Liga MX and academy football
cambiodejuegoenglish.beehiiv.com
October 2, 2025 at 4:38 PM
✏️ Studying tempo in a high press, inspired by tactical analysis from @jonmackenzie.bsky.social & @liamtharme.bsky.social

▫️Pressing a ball reception = Less progression & more recoveries

▫️More time on the ball = More long passes & better success %

cambiodejuegoenglish.beehiiv.com/p/tempo-and-...
Pressing the ball reception can improve high press efficiency
Studying the concepts of tempo and access in a high press
cambiodejuegoenglish.beehiiv.com
September 15, 2025 at 3:39 PM
Reposted by Tom Harrison
🤔🤔🤔
✍️ Pressing the ball reception can improve high press efficiency

▫️Limiting time on the ball before a pressing action reduces opposition ball progression

▫️Generating turnovers is more complex, as increased time pre-press leads to more long passes

cambiodejuegoenglish.beehiiv.com/p/tempo-and-...
Tempo and access: Key concepts for a successful high press?
Studying opposition time on the ball before being put under pressure
cambiodejuegoenglish.beehiiv.com
September 13, 2025 at 2:52 AM
Reposted by Tom Harrison
This one is good

And applies to the importance of shots from the likes of DJJ and Lukic from outside the box

#doop
✍️ Blocking the goalkeeper's sightline can increase goal probability

▫️Defensive positioning study with @statsbomb.com data

▫️Pressuring shots reduces goal probability

▫️If a defender can't pressure the shot they should move to clear the keeper's view

cambiodejuegoenglish.beehiiv.com/p/blocking-t...
Blocking the goalkeeper's sightline can increase goal probability
Analysis of defensive positioning and the impact of pressure on a shot
cambiodejuegoenglish.beehiiv.com
September 13, 2025 at 12:56 PM
✍️ Pressing the ball reception can improve high press efficiency

▫️Limiting time on the ball before a pressing action reduces opposition ball progression

▫️Generating turnovers is more complex, as increased time pre-press leads to more long passes

cambiodejuegoenglish.beehiiv.com/p/tempo-and-...
Tempo and access: Key concepts for a successful high press?
Studying opposition time on the ball before being put under pressure
cambiodejuegoenglish.beehiiv.com
September 12, 2025 at 5:06 PM
Reposted by Tom Harrison
You may well have seen this but I enjoyed this recently

bsky.app/profile/tomh...
✍️ Blocking the goalkeeper's sightline can increase goal probability

▫️Defensive positioning study with @statsbomb.com data

▫️Pressuring shots reduces goal probability

▫️If a defender can't pressure the shot they should move to clear the keeper's view

cambiodejuegoenglish.beehiiv.com/p/blocking-t...
Blocking the goalkeeper's sightline can increase goal probability
Analysis of defensive positioning and the impact of pressure on a shot
cambiodejuegoenglish.beehiiv.com
September 8, 2025 at 6:02 PM
A pleasure to provide some quotes for the @cesarhfutbol.bsky.social piece on Gilberto Mora

Check it out below 👇
"This kid could definitely be a Champions League-level player in the future"

Meet 16-year-old Mexican wonderkid Gilberto Mora, one of the most exciting young players in world soccer and a possible savior for El Tri at the World Cup.

www.espn.com/soccer/story...
Introducing Gilberto Mora, 16, Mexico's great hope for the 2026 World Cup
Gilberto Mora is one of the most exciting talents that Mexico has produced in the last few years, as the teenager will now look to live up to that hype at the World Cup.
www.espn.com
September 5, 2025 at 7:41 PM