The win, along with a Binghamton Rumble Ponies loss, put the Thunder (26-17) in a first-place tie in the Eastern Division standings.
Rebuilding his pitch count in just his second start back from a stint on the injured list, Stephan pitched three and two-third innings for the Thunder, striking out four while walking three and allowing one run. Rosa (2-1) pitched the remainder of the game, holding the Sea Dogs (13-30) to one additional run over five and one-third innings.
Zack Zehner laced an RBI-single to left field off Portland starter Dedgar Jimenez (1-3) in the bottom of the third for a 1-0 Thunder lead. The Sea Dogs tied the score in the fourth, as a Cody Asche walk issued by Stephan came around to score on a Tate Matheny single off Rosa, who had entered in relief with two out.
A Matt Lipka sacrifice fly added an insurance run in the bottom of the eighth and provided cushion for the ninth, when Matheny delivered another RBI-single but was then left stranded on second.Your Thunder conclude their homestand on Thursday morning at 10:30 a.m. against the Sea Dogs. RHP Rony Garcia(1-3, 4.22) will start for the Thunder, and LHP Kyle Hart (3-5, 2.77) will go for Portland. Tickets for the Education Day game are available by phone at 609-394-3300 or online at TrentonThunder.com.