A Jokerit staple, Mäki has never represented any other team while playing in Finland. Now playing his 9th regular season for Jokerit.
Mäki played his entire junior career in Jokerit and won a Finnish Championship silver at the A-junior level in 2003. The forward was a part of the Finnish national junior team that won bronze at the IIHF World U18 Championship bronze in 2001, as well as two straight bronze medals at the IIHF World U20 Championship. He played three years in North America and one NHL game for Calgary. Mäki returned to Jokerit for the 2008-09 season, and has not left his own club since. In the Finnish Elite League, Mäki won silver in 2005 and bronze in 2012.