New Colorado Rockies pitcher Jair Jurrjens is feeling better Saturday, a day after he was hospitalized for tightness in his chest.

Jurrjens, 28, struggled to catch his breath during his start at Coors Field on Friday night against the Los Angeles Dodgers.

X-rays and blood work revealed nothing serious and his shortness of breath may have been caused by the effects from the high altitude in Denver.

"Super scary," Jurrjens said. "Every time I wanted to take a deep breath, I wasn't able to. Just got tighter and tighter."

It was Jurrjens' first start of the season. He was acquired in a trade with the Cincinnati Reds on Wednesday.

He started struggling to breathe in the second inning and took a puff from an oxygen inhaler.

"I was having problems after my warmup pitches," Jurrjens said. "I took my time, too. That's why I was standing behind the mound, just trying to get my breath."

Jurrjens gave up eight runs in 4 2/3 innings but did not consider coming out of the game before that.

"I'm not going to make excuses to get out of the game," he said. "I just need to get used to (the elevation) and that's it."

Jurrjens has pitched at Coors Field in the past when he played for the Atlanta Braves, but said it did not bother him then.

Rockies manager Walt Weiss said that he believes stress contributed to Jurrjens' condition. It was his first major-league start since June 29, 2013.

"People react differently when they get here, with the altitude and everything," Weiss said. "I think that was part of it. Everything was probably moving real fast for him. All of a sudden he was here and starting in a big league game again. I'm sure things were spinning."

Jurrjens is working with the team's strength coach to prepare for his next start in the high altitude on Wednesday against the San Diego Padres.