Bourn will miss Sunday's series finale against the Phillies and then take advantage of Monday's scheduled off-day. He is hoping to return to the lineup for Tuesday's series opener against the Marlins.
"It's just jammed," Bourn said as he dipped his sore thumb in a cup of cold water. "They did all of the tests on it and all of that. There wasn't any fractures or anything like that."
Bourn suffered the ailment after he was forced to rush to second base after freezing on Martin Prado's soft single to shallow center with one out in the fourth inning. After he dove into second base, he remained on his knees momentarily and appeared to be in pain. He continued to flex his left hand until he returned to the dugout for a quick evaluation just before taking the field in the bottom of the fourth.
"I did it before where I tore my ligament, so I know what it feels like," Bourn said. "I knew I jammed it. I was just thinking, 'Get to second,' because I wanted Martin to get the hit. It dropped in there, and the last thing I wanted was to get out there. So in my head, all I was thinking was, 'Get to the bag.' I was just going too fast and I slid head first. I don't like to slide head first, and that's the reason why, it's too risky."