|Date of birth||18 April 1991|
|Place of birth||Seinäjoki, Finland|
|Height||1.85 m (6 ft 1 in)|
|Playing position||Centre back|
|* Senior club appearances and goals counted for the domestic league only and correct as of 30 November 2016.
‡ National team caps and goals correct as of 10:58, 25 June 2014 (UTC)
However, during his time in England, he never got any chance to prove his merit and only managed to play in two reserve league matches. After his link with Portsmouth expired, he signed with Inter Turku on August 2010. After the 2011 season his contract with Inter expired and he signed a two-and-a-half-year contract with Ludogorets. Mäntylä left the team from Razgrad in the summer of 2014 and moved back to Scandinavia. He made his debut in the national team in Helsinki in a friendly game against Czech Republic on May 21, 2014 (2−2).
- As of 30 November 2016
|Ludogorets Razgrad||2011–12||A Group||3||0||1||0||—||4||0|
- Bulgarian A Group. (3): 2011–12, 2012–13, 2013–14
- Bulgarian Cup (2): 2011–12, 2013–14
- Bulgarian Supercup (2): 2012, 2014
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