They appear to be made by Mims Wristbands, a company that, again after a hiatus, is making customized wristbands for Major League Baseball players that feature the player's likeness. From 1986-1992, Mims made bands for many of the game's biggest stars.
Padres had lost four straight and seven of eight, falling to 20-24 and putting manager Bud Black's job in possible jeopardy. But Justin Upton's big day at the plate led the way to a positive day. That, plus Bernie Williams gets treated like a legend at Yankee Stadium in the Eye on MLB.