sfgate.com photo: Toronto Blue Jays pitcher Marcus Stroman works against the Oakland Athletics in the first inning of a baseball game Friday night at the Oakland Coliseum 

By Matt Harrington

OAKLAND — The proof hadn’t quite been in the pudding for Marcus Stroman this season, but that changed after Friday night. The Blue Jays beat the hosting Oakland A’s 5-1, with Stroman picking up his first win of the season, despite entering play with a sub-2 ERA. Matt Chapman knocked in the only run for Oakland (11-11) while Brandon Drury homered for the Jays (9-12).

Stroman (1-3, 1.74 ERA) looked to go the distance, but was lifted in the ninth inning after allowing the leadoff batter of the inning Kendrys Morales to reach base. His line wound up being six hits, one earned run and six strikeouts. He lowered his ERA to 1.76, but was 0-3 entering Friday’s game. Closer Ken Giles finished out the ninth.

The A’s pounced on Stroman early, with Marcus Semien singling with one out in the first then scoring from first on Matt Chapman’s RBI double for 1-0 lead. The wheels fell of for the Green and Gold in the top of the next inning though, with the Jays knocking four runs off starter Aaron Brooks (2-2, 5.32 ERA).

The first three batters reached base before Brooks got Drury to pop out. Then Socrates Brito singled in a run, Danny Jansen knocked in two and former Athletic Eric Sogard knocked in one in three consecutive plate appearances. Brooks got the final two outs, but was tagged again in the top of the fourth for the solo shot by Drury. He finished with five innings in the books and five runs on six punchouts. Yusmeiro Petit, Fernando Rodney and Joakim Soria all game on for scoreless relief appearances.

Saturday’s contest will feature Matt Shoemaker squaring off against opening day starter Mike Fiers. Fiers has a 2-1 record, despite his 7.06 ERA.