Tyler Alexander recorded his first major league victory, Jordy Mercer hit a two-run homer and the host Detroit Tigers defeated the Baltimore Orioles 5-2 on Monday.Alexander (1-3) limited the Orioles to one run on four hits and didn’t issue a walk in six innings. Joe Jimenez struck out Trey Mancini with the bases loaded in the ninth for his seventh save.Victor Reyes had a double and a triple, scored a run and knocked in two more for Detroit. Dawel Lugo scored a run and had an RBI.Detroit designated hitter Miguel Cabrera returned to the lineup after missing two games with knee soreness. He went 0-for-4.Mancini hit a solo homer for Baltimore, which split the four-game series between the majors’ worst teams. Rookie starter John Means (10-11) gave up five runs on six hits in 5 2/3 innings.Detroit struck early when Reyes led off the bottom of the first with a triple and scored on Mercer’s 424-foot blast to left-center field.Mancini led off the fourth with a double to left. He advanced to third on a groundout but Alexander retired the next two batters on a strikeout and fly ball.The Tigers extended their lead to 4-0 in the fifth. Lugo led off with a single and Travis Demeritte reached on an infield hit. Means retired the next two batters before Reyes doubled to left-center, bringing home both runners. Reyes was thrown out trying to stretch the extra-base hit into another triple.