MLB player Brett Gardner bats left.
MLB player Brett Jackson bats left.
MLB player Brett Oberholtzer bats left.
MLB player Brett Cecil bats right.
MLB player Brett Hayes bats right.
MLB player Brett Lawrie bats right.
MLB player Brett Marshall bats right.
MLB player Billy Hamilton can bat right or left (i.e. he is a switch hitter).
On the 2010 active roster as of May 20, Brett Gardner and Juan Miranda both bat and throw left-handed. Nick Swisher throws left handed and is a switch hitter. When interleague play starts and pitchers bat, both C.C. Sabathia and Andy Pettitte bat and throw lefty.
MLB player Abraham Almonte can bat right or left (i.e. he is a switch hitter).
MLB player Adrian Nieto can bat right or left (i.e. he is a switch hitter).
MLB player Alberto Callaspo can bat right or left (i.e. he is a switch hitter).
MLB player Andres Blanco can bat right or left (i.e. he is a switch hitter).