| Mikołaj Grzelak | |
| Fullname: | Mikołaj Grzelak |
| Birth Date: | 20 June 1991 |
| Birth Place: | Bełchatów, Poland |
| Height: | 1.8m (05.9feet) |
| Position: | Defender |
| Currentclub: | GKS Bełchatów |
| Clubnumber: | 16 |
| Youthyears1: | 2009–2012 |
| Youthclubs1: | GKS Bełchatów |
| Years1: | 2012–2014 |
| Caps1: | 2 |
| Goals1: | 0 |
| Clubs1: | GKS Bełchatów |
| Years2: | 2013–2014 |
| Caps2: | 28 |
| Goals2: | 0 |
| Clubs2: | GKS Bełchatów II |
| Years3: | 2014–2015 |
| Caps3: | 11 |
| Goals3: | 0 |
| Clubs3: | Omega Kleszczów |
| Years4: | 2015 |
| Caps4: | 1 |
| Goals4: | 0 |
| Clubs4: | Rozwój Katowice |
| Years5: | 2015–2017 |
| Caps5: | 82 |
| Goals5: | 3 |
| Clubs5: | Legionovia Legionowo |
| Clubs6: | GKS Bełchatów |
| Caps6: | 79 |
| Goals6: | 0 |
| Years6: | 2018–2022 |
| Clubs7: | GKS Bełchatów |
| Caps7: | 52 |
| Goals7: | 5 |
| Years7: | 2022– |
| Club-Update: | 10 June 2024 |
Mikołaj Grzelak (born 20 June 1991) is a Polish professional footballer who plays as a defender for III liga, group I club GKS Bełchatów.
Grzelak made his Ekstraklasa debut in a 0–2 away loss against Górnik Zabrze on 2 November 2012, playing 9 minutes.
He suffered a serious injury in a I liga match against Bruk-Bet Termalica Nieciecza on 12 July 2020.[1]
Grzelak returned to playing after 236 days of absence in a league fixture against Miedź Legnica on 5 March 2021.[2]
On 7 September 2022, he rejoined GKS Bełchatów, now in fifth division, on a deal until the end of the season.[3]
GKS Bełchatów