Jacoby McCabe Ellsbury (first name pronounced /dʒəˈkoʊbi/; born September 11, 1983 in Madras, Oregon) is a Major League Baseball outfielder for the Boston Red Sox. Ellsbury was first drafted, though did not sign, by the Tampa Bay Rays in the 23rd round of the 2002 MLB Draft; he was then drafted by Boston in 2005, 23rd overall, in the draft, after three years at Oregon State University.

Ellsbury is officially enrolled as a member of the Colorado River Indian Tribes and is the first Native American of Navajo descent to reach the Major Leagues. As of 2008, he is one of only three active non-Hispanic Native American players in Major League Baseball, with the others being Kyle Lohse of the St. Louis Cardinals and Joba Chamberlain of the New York Yankees.

Ellsbury began his professional career on July 14, 2005, with the Lowell Spinners in the short-season Single-A New York-Penn League. From the start, he showed that his patience and great speed were an asset when he led off the game by walking on a 3-2 pitch, stealing second, continuing to third on a throwing error and then scoring on a wild pitch. On September 7, he tied a Lowell team record with three stolen bases in a game. He finished the season batting .317 with 23 stolen bases in 35 games.