"Roy Halladay was smiling and upbeat the day after leaving Monday night's start with heat exhaustion.

"I thought I could get through it, but that last inning I felt like I was about to get wheeled off the mound," the Phillies ace said before Tuesday night's game against the Cubs at still sweltering Wrigley Field.

It was 91 degrees at game time Monday night and the heat index was 103. The oppressive humidity got the best of Halladay as he plowed his way through a 31-pitch third inning. After the inning, he removed his undershirt and wiped himself down with an ice towel in the dugout. He made it through the fourth inning but was removed feeling lightheaded and dizzy in the fifth.

The oppressive conditions were exacerbated by the ballpark. Wrigley Field is 97 years old. The dugouts are small, cramped and as hot as brick ovens on summer days. There is no air conditioned area behind the dugouts, as there are in many new parks, where a player can find relief."