Aki-Petteri Arvid Berg (pronounced [ˈbærj]; born July 28, 1977) is a Finnish former professional ice hockey defenceman.

[1] Berg began his professional career in the 1993–1994 season as a 16-year-old, playing 6 games for TPS in the Finnish SM-liiga with 3 assists and a +4 rating.

Berg was, at the time, the youngest player ever to play in an SM-liiga game (has since been surpassed by Jesse Joensuu, who was 15 years old in his debut).

Berg also spent time in Kiekko-67 of the Finnish first division for 12 games during the season, scoring 1 goal, 1 assist, 16 penalty minutes and a -8 rating.

Berg gained the attention of NHL scouts due to his large frame, heavy shot, physical play and good mobility.

He was drafted 3rd overall by the Los Angeles Kings, behind fellow defencemen Bryan Berard and Wade Redden.

Berg, a highly touted prospect, was described in The Hockey News' draft review issue by Kings' then GM Sam McMaster as "Hitting like Scott Stevens and skating like Paul Coffey".

In the 1997-98 season, Berg finally became an NHL regular, playing 72 games for the Kings, with no goals, 8 assists, 61 PIM and a +3 rating.

After 47 games with the Kings where he had just 4 points, he was traded to Toronto on March 13, 2001 for Adam Mair and a 2nd round draft pick (later used to select Mike Cammalleri), as the Leafs wished for an injection of youth into a rapidly aging roster.

The team also had a successful playoff run, making it to the conference finals, where they were beaten in six games by the Carolina Hurricanes.

Berg finished his NHL career with 606 regular season games played, 15 goals and 70 assists for 85 points with a +/- rating of -7 and 374 penalty minutes.