Chase Utley (head) will not play this weekend. Utley suffered a mild concussion Wednesday when he was struck in the batting helmet by an Eric O'Flaherty pitch. It's not a major injury, but the first-place Phillies have the luxury of playing this one extra carefully. Utley should be back in the starting lineup for Monday's series opener against the Astros. He will undergo an IMPACT concussion test two days from now.