Jason Wyatt Hart (born September 5, 1977) is an American former professional baseball outfielder and first baseman.

He was selected by the Oakland Athletics in the fifth round of the 1998 Major League Baseball Draft, and signed with the club.

He began his professional career in 1998 with the Southern Oregon Timberjacks, hitting .258 with 20 home runs and 69 RBI with them.

He led or tied for the Northwest League lead in games played, home runs and RBI.

He spent most of the season with the Double-A Midland RockHounds, hitting .326 with 44 doubles, 30 home runs and 121 RBI for them.

Although he spent most of the year with the Rockhounds, he also played five games for the Triple-A Sacramento River Cats, hitting .278 with one home run, one double and four RBI in 18 at-bats.

On January 14, 2002, Hart was traded with Gerald Laird, Ryan Ludwick, and Mario Ramos to the Rangers for Carlos Peña and Mike Venafro.

Indeed, he did show some improvement in 2002, hitting .263 with 25 home runs and 83 RBI for the Triple-A Oklahoma City RedHawks.

In total, Hart hit .271 with 174 home runs, 243 doubles, and 687 RBI in eight minor league seasons.

Hart spent the 2010 and 2011 season as the hitting coach of the Hickory Crawdads of the Single–A South Atlantic League.