LOS ANGELES -- Ted Lilly made his major-league debut with the Montreal Expos, which is another way of saying he's been at this a while.

The Dodgers are accustomed to carefully monitoring the 37-year-old pitcher's health on a start-by-start basis, so in a way this is nothing new. Lilly had felt a bit of tightness in his back after his previous start in New York last week and it returned in the first inning of Monday night's 12-2 loss to the Colorado Rockies, in which Lilly got hit around for three innings.

He'll be examined Tuesday and is questionable for his start this weekend in San Francisco. If he can't go, he'll likely be replaced in the Dodgers' rotation by rookie Matt Magill.

Lilly admitted he's concerned about making his next start.

"Well, I mean I think I have a few things to be concerned about, that being one of them and then just ineffectiveness, too," Lilly said. "A lot of guys in the clubhouse here aren't feeling as good as they'd like to, but you still expect to get the results you're looking for."

Lilly threw 71 pitches in three innings, allowing five runs on eight hits, including a couple of first-inning home runs. The Dodgers have used nine starting pitchers in the season's first month.

"We've got to find out if Teddy's healthy tomorrow and kind of make decisions from there," Dodgers manager Don Mattingly said.