PHOENIX - The Arizona Diamondbacks say outfielder Adam Eaton's injured left elbow has an irritation but no structural damage.
Still, it's a setback for Eaton, who has been on the disabled list all season. The Diamondbacks say he will spend two to three weeks doing strengthening exercises, then begin a throwing program.
Eaton was within days of his scheduled return to the Diamondbacks when he felt discomfort in the elbow during a rehab start Monday for Triple-A Reno. He returned for an examination Tuesday.
The rookie had been slated to start in center field and bat leadoff this season.
Eaton hit .259 in 85 at-bats for the Diamondbacks last year. He homered twice and stole two bases.
Utley placed on DL
PHILADELPHIA - The Philadelphia Phillies placed five-time All-Star second baseman Chase Utley on the 15-day disabled list with an oblique strain.
Utley could miss up to four weeks. The team will make a roster move before tonight's game at Washington.
"We do believe and hope that Chase will be ready to play in Philadelphia within 15 days," general manager Ruben Amaro Jr. said. "We are being cautious with this injury as it is a tricky one and want to make sure it isn't an issue for him throughout the season."
Utley is batting .272 with seven homers and 25 RBIs. Freddy Galvis has replaced him in the starting lineup.
Montero sent down
SEATTLE - The Seattle Mariners sent slumping catcher Jesus Montero to the minor leagues Thursday.
The Mariners optioned Montero to Triple-A Tacoma. He has 72 hours to join the club.
The 23-year-old Montero is hitting .208 with three home runs and nine RBIs. He's also been a designated hitter, and there are concerns about his impatience at the plate.
Nolin to debut for Jays
TORONTO - The Blue Jays are promoting left-hander Sean Nolin to make his major league debut tonight against Baltimore.
A sixth-round draft pick in 2010, Nolin went 10-0 with a 2.04 ERA in 20 games at two minor league levels last season, including a 9-0 mark at Class A Dunedin.
He's started 2-0 with a 1.17 ERA in three games at Double-A New Hampshire this season.