BOSTON (AP) -- Jon Lester allowed no earned runs for the third time in four starts, and the Boston Red Sox completed a three-game sweep of the Kansas City Royals with a 6-0 win Sunday.

In eight innings, the All-Star left-hander struck out eight and gave up two walks and four hits. Only one Royals player reached third base.

Lester (10-7) is 4-0 with a 0.85 ERA over his last seven starts with 47 strikeouts and eight walks in a span of 52 2-3 innings. He has yielded just one earned run in 31 innings.

Lester extended his scoreless streak to 14 innings before Junichi Tazawa got the first out of the ninth. Edward Mujica retired the next two batters.

Yordano Ventura (7-8) gave up all six runs.


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