Cardinals LF Reggie Sanders might miss a month or more because of a broken bone in his right leg.

Sanders was placed on the disabled list yesterday, three days after he collided with CF Jim Edmonds as they chased a fly ball. Tests taken Sunday showed that the 37-year-old outfielder has a hairline fracture of his right fibula that could keep him out longer than a month.

Sanders was second on the Cardinals with 18 home runs, third with 44 RBI and first with 14 stolen bases in 15 attempts.

Sanders didn't play after the collision with Edmonds on Friday night.

The Cardinals purchased the contract of OF John Rodriguez from Class AAA Memphis. Rodriguez, 27, was batting .342 with 17 homers and 47 RBI in 34 games at Memphis after being acquired from Cleveland in June.

Rodriguez, who has played primarily center field and right field, made his major league debut last night. He spent eight seasons in the Yankees organization before signing as a minor league free agent with the Indians before this season. . . .

3B Scott Rolen underwent strength tests on his surgically repaired left shoulder. Rolen has played well defensively since returning in mid-June, but had been in a 1-for-26 slump before an RBI double in a 3-0 victory over Houston on Sunday.

Rolen was out of the lineup because of pain and soreness associated with an arthrogram, in which dye was injected into the affected area. He expects to return to the lineup today.

* C. JONES RETURNS: The Braves activated 3B Chipper Jones from the 15-day DL, and the five-time all-star was in the lineup for their game against the Giants.

Jones has missed 43 games this season, including 35 since going on the DL on June 6 with a partially torn ligament in his left foot. He began taking batting practice last week.

To make room on the roster, Atlanta optioned RHP Roman Colon to Class AAA Richmond.

-- From News Services

The Cardinals' Reggie Sanders is checked on during Friday's game after colliding with fellow outfielder Jim Edmonds.