NL Notes: Wieland, Stewart, Detwiler, Mets, Stanton

With all the bad news on pitching injuries in recent days, it was refreshing to hear at least some positive reports. Earlier today, we learned that Jon Niese of the Mets is not in need of surgery. And later this evening, Padres GM Josh Byrnes said that an MRI on Joe Wieland's right elbow did not reveal UCL damage, as Jeff Sanders of the San Diego Union Tribune reports. Wieland will still be monitored and assessed closely over the coming days, particularly as he is still working back from Tommy John surgery, but will hopefully remain on track to re-start his career and give the club some depth over the coming season. 

• One injury situation that seems headed in the wrong direction is that of Pirates backup catcher Chris Stewart, who suffered a knee injury. Surgery is "probable," the club said today, as Bill Brink of the Pittsburgh Post-Gazette tweets. Stewart is set to visit Dr. James Andrews before deciding on a course of action.
• ESPN.com's Buster Olney weighed in on the possible opening in Pittsburgh (Twitter links), noting that the team probably prefers to give Tony Sanchez another year of seasoning in Triple-A before promoting him. That could, Olney suggests, leave the club interested in adding a player like Miguel Olivo or one of the Yankees' surplus backstops. (As Olney notes, the Pirates' own surplus of relief arms might make for a good match with New York.)
• The Nationals will start the year with lefty Ross Detwiler working from the pen, reports MLB.com's Bill Ladson. While Tanner Roark, Taylor Jordan, and Chris Young battle it out for the fifth and final rotation slot, Detwiler will slide in alongside Jerry Blevins as a southpaw relief option. "He provides something special out of the bullpen," said manager Matt Williams. "… We just feel we are a better team with him coming out of our bullpen. He is a power lefty, mid-90s lefty. It doesn't mean he won't start in the future … ."
• For the Mets, several starting positions still appear to be in flux. At first base, the long-anticipated showdown between Lucas Duda and Ike Davis has not gone anywhere with both still not cleared to run or play defense, writes Anthony Rieber of Newsday. If neither is ready, Josh Satin could take the Opening Day gig by default. Elsewhere, Wilmer Flores is surely a longshot to start at shortstop, but nevertheless he'll get another look there tomorrow, reports ESPN.com's Adam Rubin. While the move comes as Ruben Tejada continues to struggle at the plate and in the field, manager Terry Collins said that the decision is unrelated.
• Marlins star Giancarlo Stanton says he is pleased with how things are going in Miami, but nevertheless "need[s] a season" to assess his long-term future with the club, reports Jon Heyman of CBSSports.com. "There's a good vibe here," said Stanton, "and I'd say so if it wasn't."