OAKLAND (CBS / AP) — Mike Trout hit his first home run of the season, Nick Tropeano pitched five scoreless innings in his season debut and the Los Angeles Angels beat the Oakland Athletics and ace Sonny Gray 4-1 on Monday night.

Daniel Nava and C.J. Cron added RBI singles to help the Angels win their second straight following a 1-4 start.

Trout struck out looking twice but homered on the first pitch he saw from Gray in the sixth, a towering two-run shot that ricocheted off the right side of the bleachers just below the luxury suites in left-center field.

Gray (1-1) was sharp in his second outing but lost for just the second time in 12 April starts. He allowed three runs over 6 1/3 innings, struck out six and walked three.

Tropeano (1-0) was just a little better.

Called up from Triple-A Salt Lake City last week after the Angels placed Andrew Heaney on the disabled list, Tropeano gave up six hits in five-plus innings. He struck out six, walked two and pitched out of two-on, two-out jams three times while stopping the A’s three-game winning streak.

Next, on Tuesday night, Oakland plays against Los Angeles for the second game of the series.