Penn reached the big leagues with the Orioles in 2005, and he’s appeared in seven Grapefruit League games this spring. The right-hander is 0-3 with a 10.06 ERA in 17 innings.
The 24-year-old Penn was 0-4 with a 15.10 ERA in six starts last year, logging 19 2/3 innings.
Additionally, the Fish found a left-handed hitter to come off the bench. The Marlins acquired 33-year old Ross Gload and cash from the Kansas City Royals for a player to be named later.