Red Sox slugger David Ortiz will retire at the end of the upcoming 2016 season, according to FOX Sports' Ken Rosenthal.

Ortiz will turn 40-years-old tomorrow.

"Big Papi" has been with the Red Sox since the 2003 season and has gained a reputation as one of the more clutch hitters in MLB history since that time. He has powered the Sox to three World Series titles in the past 12 years.

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Ortiz belted 37 home runs this past season, his highest total since 2005.