Osich (1-0) retired the only batter he faced to earn the win in Friday's 2-1 win over the Cubs.
The 32-year-old was called on to relieve Art Warren with one on and two outs in the sixth inning. Osich got Jason Heyward to ground out, and Cincinnati pulled ahead in the bottom of the sixth to put the southpaw in position for the win. He's now posted a 1.50 ERA and 1.00 WHIP across six innings since he joined the major-league roster June 19.