On the Yankees beat

Notes from a pregame in Baltimore:
--- Mariano Rivera probably won't pitch until Monday, but he says he's "95 percent" better with his back. The Yankees closer played catch with Ron Guidry in the outfield at Camden Yards before the game with the Orioles on Saturday, his first baseball activity since he hurt his back while putting on his left cleat Thursday.
-- Jason Giambi was scratched just before the game with the same stomach virus that felled Alex Rodriguez on Friday. A-Rod did not start for the second straight game. Kevin Thompson made his major-league debut in rightfield.
-- Shawn Chacon will pitch for the Trenton Thunder in a rehab start Sunday. Chacon is the third Yankee to appear in a game for the Thunder. The other two were Carl Pavano and Gary Sheffield. The Yankees hope the third time is the charm.
-- Saw two fans wearing a "Got Melky?" t-shirt for the first time. Maybe I'm a little behind, but I didn't know Melky Cabrera had earned his own t-shirt yet. He has officially arrived.