On August 31, 2011 — Clubs headed for the postseason tweak their rosters on the last day when they can add players and still have them be eligible for postseason play. The Giants, who are falling ever further behind the red-hot Diamondbacks, designate veterans Aaron Rowand and Miguel Tejada for assignment, eating about $15 million in salary in the process; they use the freed-up spots to activate OF Pat Burrell from the disabled list and call up IF Brett Pillfrom the minor leagues in a bid to wake up their slumbering offense. For their part the Rangers repatriate C Matt Treanor from Kansas City and bring in P Mike Gonzalez from Baltimore, and the Red Sox bring in OF/1B Conor Jackson from Oakland as they receive news that the injured J.D. Drew may be done for the season. The Braves also repatriate a former player in OF Matt Diaz, brought back from the Pirates.
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Sources:
Baseball Reference August 31
National Pastime August 31
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game