Ron-Robert Zieler
37 yrs · Goalkeeper · Germany
1.FC Köln · Bundesliga · Foot: right · Height: 188 cm
Contract: until 30 Jun 2027
No model evaluation for this player. MoneyballAI evaluates players with at least 450 league minutes last season in leagues where match-level player data is available from the current free source (14 European top divisions). Market value and transfer history are still shown below.
Market value
€500k
Updated 7 days ago
Estimated acquisition
—
Estimated · 20–80% range
Model value
—
Performance-implied · estimated
Projected (24m)
—
Resale range · estimated
Potential value gap
—
Model value − acquisition
Market value history
Market value ≠ transfer fee ≠ acquisition cost.
Highest recorded: €9.5M
Season-by-season (domestic league)
Context-adjusted values are model outputs.
| Season | Club | League | Pos | Apps | Min | Min share | G | A | G+A/90 | Adj. G+A/90 | Opp. Elo | Team Elo | League str. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020/21 | 1.FC Köln | Bundesliga | GK | 1 | 50 | 2% | 0 | 0 | 0.00 | 0.00 | 1438 | 1400 | 1.06 |
| 2018/19 | VfB Stuttgart | Bundesliga | GK | 34 | 3060 | 100% | 0 | 0 | 0.00 | 0.00 | 1512 | 1402 | 1.05 |
| 2017/18 | VfB Stuttgart | Bundesliga | GK | 34 | 3060 | 100% | 0 | 0 | 0.00 | 0.00 | 1518 | 1506 | 1.04 |
| 2016/17 | Leicester City | Premier League | GK | 9 | 753 | 22% | 0 | 0 | 0.00 | 0.00 | 1495 | 1536 | 1.07 |
| 2015/16 | Hannover 96 | Bundesliga | GK | 34 | 3060 | 100% | 0 | 0 | 0.00 | 0.00 | 1530 | 1335 | 1.02 |
| 2014/15 | Hannover 96 | Bundesliga | GK | 34 | 3060 | 100% | 0 | 0 | 0.00 | 0.00 | 1536 | 1433 | 1.03 |
| 2013/14 | Hannover 96 | Bundesliga | GK | 34 | 3060 | 100% | 0 | 0 | 0.00 | 0.00 | 1550 | 1473 | 1.03 |
| 2012/13 | Hannover 96 | Bundesliga | GK | 34 | 3060 | 100% | 0 | 0 | 0.00 | 0.00 | 1442 | 1548 | 1.11 |
Cups & continental competitions
| Season | Competition | Club | Apps | Min | G | A | Avg opp. Elo |
|---|---|---|---|---|---|---|---|
| 2025/26 | Dfb Pokal | 1.FC Köln | 2 | 180 | 0 | 0 | — |
| 2018/19 | Dfb Pokal | VfB Stuttgart | 1 | 90 | 0 | 0 | — |
| 2017/18 | Dfb Pokal | VfB Stuttgart | 3 | 300 | 0 | 0 | — |
| 2016/17 | Fa Cup | Leicester City | 2 | 210 | 0 | 0 | — |
| 2016/17 | Uefa Champions League | Leicester City | 1 | 90 | 0 | 0 | 1456 |
| 2015/16 | Dfb Pokal | Hannover 96 | 2 | 180 | 0 | 0 | — |
| 2014/15 | Dfb Pokal | Hannover 96 | 2 | 180 | 0 | 0 | — |
| 2013/14 | Dfb Pokal | Hannover 96 | 2 | 180 | 0 | 0 | — |
| 2012/13 | Uefa Europa League | Hannover 96 | 8 | 720 | 0 | 0 | 1491 |
| 2012/13 | Uefa Europa League Qualifying | Hannover 96 | 4 | 360 | 0 | 0 | 1319 |
| 2012/13 | Dfb Pokal | Hannover 96 | 3 | 300 | 0 | 0 | — |
Small continental samples are shown for context only and are not over-weighted.
Historical comparables
Most similar profiles 2+ years ago (same position group) and what happened next. Chosen by similarity only — failures included.
No comparables computed for this player.
Transfer history
Fees as reported by the source; undisclosed fees shown as unknown, never estimated.
| Date | From | To | Fee | MV at time |
|---|---|---|---|---|
| 7 Jul 2025 | Hannover 96 | 1.FC Köln | €200k | €500k |
| 30 Jun 2021 | 1.FC Köln | Hannover 96 | Free / loan | €1.0M |
| 13 Aug 2020 | Hannover 96 | 1.FC Köln | Free / loan | €2.0M |
| 1 Jul 2019 | Stuttgart | Hannover 96 | €750k | €4.5M |
| 11 Jul 2017 | Leicester | Stuttgart | €4.0M | €7.0M |
| 1 Jul 2016 | Hannover 96 | Leicester | €3.5M | €8.0M |
| 1 Jul 2010 | Man Utd Res. | Hannover 96 | Free / loan | €300k |
| 1 Feb 2009 | Northampton | Man Utd Res. | Free / loan | €300k |
| 27 Nov 2008 | Man Utd Res. | Northampton | Free / loan | €300k |
| 1 Jul 2007 | Man Utd U18 | Man Utd Res. | Unknown | €125k |
| 1 Jul 2005 | 1.FC Köln U17 | Man Utd U18 | €100k | €125k |
| 1 Jul 2004 | 1.FC Köln Yth. | 1.FC Köln U17 | Unknown | Data unavailable |
| 1 Jul 1999 | SCB Vikt. Jgd. | 1.FC Köln Yth. | Free / loan | Data unavailable |
MoneyballAI identifies statistical opportunities from available data. A player flagged as a potential bargain is not guaranteed to succeed, to transfer, to rise in value, or to generate resale profit. Market values, fees and contracts come from third-party sources; ranges are model estimates with stated confidence.