GMs with most to prove at MLB trade deadline

Billy Beane (Athletics) and Brian Cashman (Yankees) are two execs who could be very busy the next two weeks.The MLB trade deadline is crunch time for all GMs and baseball execs, some more than others. Here are the five front-office staffs with the most to prove in the next two weeks.

1. Hal Steinbrenner and Brian Cashman, New York Yankees

The last time the Yankees were true sellers at the trade deadline was in 1989, when they jettisoned superstar Rickey Henderson to the Oakland Athletics for outfielder Luis Polonia and relief pitchers Greg Cadaret and Eric Plunk. Yankees owner Hal Steinbrenner was still a teenager (19) at the time. Hal and his brother Hank inherited the team when their father…