(Trenton, NJ) - The Trenton Thunder, Double-A Affiliate of the New York Yankees, announce that RHP Craig Heyer has been activated from the 7-Day Disabled List. In a corresponding move, OF Austin Krum has been transferred to Triple-A Scranton/ Wilkes-Barre. The move keeps the Thunder roster at one below the minimum of 24 active players.

Heyer, who will make his fifth start of the season Saturday night for the Thunder, is 2-2 with a 3.46 ERA as a starter in 2011. The righty from Scottsdale, AZ has also appeared twice out of the Trenton bullpen this season, amassing a 1-0 record with a 1.35 ERA as a reliever.

Krum will make his first appearance at the Triple-A level after spending parts of the last three seasons in a Thunder uniform (237 games from 2009-2011). In 40 games with Trenton in 2011, the Highlands Ranch, CO native has a .242 batting average with 13 runs batted in.