Hearn allowed two unearned runs on three hits and two walks while striking out four over four relief innings in Thursday's 5-0 loss to the Angels.
Hearn was used as part of a tandem along with starter Spencer Howard, who lasted 2.1 innings before he was pulled. This was the longest outing of the season for Hearn, who the Rangers are stretching out to handle a normal workload for a starting pitcher.