Salvador Perez belted a two-run home run, Maikel Garcia and Bobby Witt Jr. also drove in a pair of runs and the Kansas City Royals completed a road-series win over the San Francisco Giants with an 8-4 romp on Wednesday afternoon.Rookie right-hander Jonathan Bowlan (1-0) was credited with his first major league win and the Royals supported six pitchers on a bullpen day with 16 hits, producing more runs than they had totaled in their previous four games.After the clubs had split low-scoring affairs to open the three-game set, the Royals jumped on Giants ace Logan Webb (5-4) for one run in the first, two in the second and three in the fourth en route to a 6-1 lead. Perez’s homer, his third of the season, delivered the fifth and sixth runs of the flurry.Witt had a sacrifice fly and an RBI double to account for two of the first four runs.Webb, who has alternated wins and losses in his last eight starts, was charged with a season-high six runs (three earned) on a season-high 10 hits. He struck out five and didn’t issue a walk.Kansas City completed its scoring in the fifth against Giants reliever Spencer Bivens when Michael Massey singled in a run and Garcia capped his two-RBI outing with a sacrifice fly.Making just his sixth appearance of a big-league career over parts of three seasons, Bowlan took over after Daniel Lynch IV worked 1 2/3 scoreless innings as an opener.Bowlan stranded Giants at first and second to end the second inning, then surrendered a solo home run to Matt Chapman and a double to Jung Hoo Lee to open the third before retiring the last three batters he faced.