Heisey was eligible for arbitration. The Reds elected to trade him instead of either tendering him a contract or letting him leave via free agency.
Originally a 17th-round pick of the Reds in the 2006 MLB draft, Heisey debuted in the majors in 2010. The following season, Heisey hit .254 with a .797 OPS, 18 home runs and 50 RBI.
Spending most of his time as the Reds' fourth outfielder, Heisey's production has decreased every year since and he was unable to seize the everyday left field job last season, hitting just .222 with a .643 OPS in 119 games.
Magill, 25, made his major league debut in 2013, going 0-2 with a 6.51 ERA in six starts. He spent 2014 at Triple A Albuquerque and went 7-6 with a 5.21 ERA in 36 games, including 12 starts.
Cincinnati went 76-86 last season and finished fourth in the National League Central. Los Angeles won the NL West at 94-68 and was eliminated in the NLDS by the St. Louis Cardinals.
- Ben Estes