In six games this week, Ellsbury hit .467 (14-for-30) with three doubles, a home run, four RBIs and 10 runs.
It is his first career award, but the third straight for the surging Red Sox (Carl Crawford and David Ortiz won the previous two). Boston, whose win streak is the longest in the Majors this year, will be in St. Petersburg on Tuesday for a division showdown against the Rays.
Ellsbury led the AL in runs and hits, was tied for second in stolen bases (two), was third in batting average and tied for fourth in on-base percentage (.500) and total bases (20) this week.
His leadoff home run -- the fourth of his career -- last Tuesday helped spark the Red Sox to a 6-4 win over the Yankees in the opener of a series that Boston would go on to sweep.
Ellsbury is in the midst of a 10-game hitting streak, batting .429 (21-for-49) with four doubles, one homer, six RBIs and five stolen bases over that span.
Boston teammates Adrian Gonzalez (.364 batting average, four doubles, 10 RBIs), Ortiz (.320 average, four homers, 13 RBIs) and Jon Lester (2-0 record, 2.57 ERA, 13 strikeouts) were also recognized for their performances this week.