Arizona Diamondbacks

Diamondbacks general manager Kevin Towers told The Arizona Republic that Adam Eaton's MRI showed some fluid around the UCL but "the ligament looked the same as his prior MRI, so no new damage."

Eaton is expected to seek a second opinion from Dr. James Andrews. He is expected to rest for 2-3 weeks before re-starting his rehab assignment.

At the start of spring training, Patrick Corbin was not even assured a spot in the Diamondbacks' rotation, after putting up a 4.54 ERA as a rookie in 2012. After nine starts, however, he has made a case for being the best pitcher in the National League so far this season. His 7-0 record and 1.44 ERA are opening eyes.

"It's impressive," D-backs Opening Day starter Ian Kennedy told MLB.com Thursday. "You're talking about a guy that people said might barely make the team in the fifth spot. He pitches well in Spring Training, but it's Spring Training. Then the season starts and he's doing pretty good now. He's on a roll now. I'm impressed."

Corbin is coming off his best start of the season, a complete-game three-hitter in a win over the Rockies that pushed him into the NL lead in wins. He also ranks second in ERA, eighth in WHIP (0.98) and has a miniscule .196 batting average allowed. 

The Rangers signed veteran Mark Teahen to a minor-league contract Thursday. Teahen was released by the Diamondbacks May 20.

Teahen had been playing for Arizona's Triple-A team prior to his release. Teahen hit .211 with three doubles and five RBI in 22 games for Reno.

The Diamondbacks announced Thursday that outfielder Adam Eaton's MRI revealed no structural damage in his elbow, after he had his rehab assignment shut down earlier in the week.

Eaton will stop throwing for two to three weeks to strengthen his left elbow before resuming his throwing program. He has been diagnosed with irritation of his left UCL, but there is no structural damage at this point. 

The team has yet to establish a concrete timeline for his possible return after this latest setback. 

Diamondbacks starting pitcher prospect Tyler Skaggs has worked through a rough patch of starts for Triple-A Reno, and on Wednesday signaled he's finally settled down. After allowing at least six runs in three of five starts from April 13-May 5, Skaggs allowed three or fewer runs Wednesday for the third straight start.

The left-hander struck out a season-high 10 in 7 2/3 innings, allowing two runs (one earned) on five hits. 

"I just felt like I had everything working -- fastball, changeup, curve -- and my catcher Ed Easley was calling a great game," Skaggs said, per MLB.com. "By far, it was easily my best start of the year. I didn't feel great in the bullpen [before the game] but got out there, started bearing down and got going."

Skaggs is 4-5 with a 5.23 ERA in nine starts. However, he's won his last two starts and has posted 2.66 ERA in his last three outings. He's managed 54 strikeouts in 51 2/3 innings this season.

"I feel like my mechanics are getting better, hitting that groove, throwing the ball well," Skaggs said. "But I wouldn't say I'm at the peak yet. I've still got things to work out, but I feel pretty good, and the numbers are starting to show that."