Joyce apologized to Galarraga after the game and was fighting back tears when he came out for the lineup card exchange at home plate prior to Thursday's game.
"It's heartbreaking to seek Jim Joyce, who's one of the better umpires and one of the more liked umpires, to have that happen to him," Blum said. "I know he's heartbroken over it. I'm also appreciative of how Galarraga handled it. He was great and showed an amazing amount of poise and courtesy. That was impressive to see, and I appreciate the heck out of that, but I definitely don't want instant replay more than we already do."
Astros first baseman Lance Berkman said mistakes are part of the game and maintains an expansion of replay isn't a pressing issue.
"Blown calls happen all the time," he said. "It's not an uncommon occurrence, and these guys are the best in the world at what they do. People make mistakes. I don't think it's a poor reflection on umpiring. It's a lot tougher than people realize because the game happens so fast.
"Things happen so quickly and many times in a baseball game the whole outcome rests on one call, so it's important to get them right. But baseball has survived 150 years without [replay] and will probably be around, if the world is, in another 150 years."