William Scott Middlebrooks (born September 9, 1988) is an American retired professional baseball third baseman and is currently a color analyst for the Boston Red Sox broadcast team on NESN.

Following Middlebrooks' emergence as the Red Sox's starting third baseman in 2012, the organization traded former All-Star Kevin Youkilis.

[10] Middlebrooks admits that he preferred football, until he realized during his junior year that he had the opportunity to be selected in the Major League Baseball draft.

[6][9][13] Middlebrooks was an athletic defensive player and hit for power[14] and was also credited for his contact skills,[15] although he was not considered the most patient hitter.

[12] Middlebrooks made his professional debut in 2008 with the Lowell Spinners of the Class A-Short Season New York–Penn League, where he batted .254 with one home run.

[9] In 2009, Middlebrooks played for the Greenville Drive of the Class A South Atlantic League, where he batted .265 with seven home runs and 57 RBIs.

[15] He was promoted to the Salem Red Sox of the Class A-Advanced Carolina League in 2010 and responded by batting .276 with 12 home runs and 70 RBIs.

[15] Middlebrooks began the 2011 season playing for the Portland Sea Dogs of the Class AA Eastern League.

[22] Through August 2011, Middlebrooks batted .306 with 18 home runs and 80 RBIs for Portland, at which point he was promoted to the Pawtucket Red Sox of the Class AAA International League.

[10][21] In November 2011, Middlebrooks, Che-Hsuan Lin, and Drake Britton were added to the Red Sox 40-man roster to protect them from being selected in the Rule 5 draft.

[28] On May 6, he hit a game-tying grand slam for his first major league home run in what was eventually a 17-inning loss to the Baltimore Orioles.

[37] The Red Sox opted not to promote Middlebrooks when they traded Iglesias on July 30, using Brandon Snyder and Brock Holt instead.

[38][39] In Game 3 of the 2013 World Series, Middlebrooks was ruled to have obstructed future teammate Allen Craig after diving for an errant throw at third base.

[42] As he rehabilitated his injury in the minor leagues, Middlebrooks began playing in the outfield, due to the Red Sox' signing of Stephen Drew.

[43] After the Red Sox traded Drew, they hoped that Middlebrooks would improve his performance with more regular playing time.

[49] On December 15, 2015, Middlebrooks agreed to a minor league contract with an invitation to spring training with the Milwaukee Brewers.

[51] Middlebrooks batted .282 with 10 home runs and 47 RBIs for Colorado Springs, before he was promoted to the major leagues on July 4.

On January 3, 2018, Middlebrooks signed a minor league contract with the Philadelphia Phillies that included an invitation to spring training.

[62] In March 2022, Middlebrooks joined NESN, where his wife Jenny worked from 2012 to 2013, as a studio analyst for Red Sox coverage.

[67] Later in 2012, Middlebrooks began dating Jenny Dell, a field reporter who covered the Red Sox for the New England Sports Network.