NL Notes: Taveras, Stutes, Flores, Cervelli

One of the keys to success for last year's Pirates ballclub was its ability both to generate ground balls and convert them into outs. It all started with a pitching staff that had far and away the highest ground-ball rate (52.5%) in the big leagues. Featuring prominently in the repertoire of several Bucs hurlers, of course, was the sinker. As Tim Williams of PiratesProspects.com found when he investigated, those sinkers come in many different varieties. He provides a fascinating breakdown of the pitch from the perspective of Pirates players and coaches (including many staff members and catcher Russell Martin). Here's more from the National League:

• With just two weeks left in camp and top outfield prospect Oscar Taveras still working his way back, there is now little chance that he'll come north with the Cardinals for Opening Day, writes Rick Hummel of the St. Louis Post-Dispatch. Of course, that was the likely outcome from the get-go, as St. Louis has a keen interest in delaying his service clock to gain another season of control and minimize the likelihood of a Super Two qualification. 
• The Phillies outrighted righty Michael Stutes off of the club's 40-man roster to begin making room for non-roster invites, reports Todd Zolecki of MLB.com. Struggling to regain velocity after a series of shoulder issues, Stutes had to clear waivers to be stashed in the minors.
• Though it may yet be a longshot, the Mets have begun working out Wilmer Flores at short, reports Anthony DiComo of MLB.com. With continuing uncertainty as to whether Ruben Tejada can be relied on as an everyday option, DiComo says the team is "overturning every stone on their 40-man roster" to find a solution. Of course, that does not mean that Flores is a serious possibility to man the job for the coming season, but he could be a more attractive big league piece if he could spend some time at short.  
• As I recently noted in the club's offseason review, the Diamondbacks have not conclusively addressed their backup catching situation. They are among the teams taking a hard look at Francisco Cervelli of the Yankees, reports George A. King III of the New York Post.