A-Rod has left the building

NEW YORK -- Alex Rodriguez exited Major League Baseball's Park Avenue offices at 5:55 p.m. on Thursday afternoon, to the cheers of 90 or so supporters, signing autographs for 10 minutes as he did the day before.

A-Rod didn't answer questions about what went on at Day 4 of his grievance hearing, but a source told ESPNNewYork.com that Rodriguez's lawyer, Joe Tacopina, has begun cross-examining MLB's star witness, Anthony Bosch. It's not known if A-Rod will testify during the hearing, which continues on Friday.