Quick Hits: Rangers, Braves, Pirates, Giants, Nats

Rangers amateur scout Jay Heafner is on hand for Nick Martinez's major league debut against the Rays tonight, and discussed scouting him as an amateur with MLB.com's T.R. Sullivan. Heafner liked "the way the ball came out of his hand, the way his delivery worked and his presence" when watching Martinez, then an infielder, work out of the bullpen. Texas ultimately selected him in the 18th round of the 2011 draft. Recognizing the right-hander's potential from limited looks as a reliever has to be considered a major win for the Rangers' scouting corps. Here's more from around the majors:

• Braves righty Cory Gearrin will seek a second opinion before submitting to Tommy John surgery, reports MLB.com's Mark Bowman. Both team doctors and Dr. James Andrews have recommended that Gearrin undergo the procedure.
• David Golebiewski of the Pittsburgh Tribune-Review examined what allows Pirates reliever Mark Melancon to avoid home runs. Since joining the Pirates, the right-hander has increased his use of the cutter to 56.1 percent of all pitches thrown, which helped boost his ground ball rate to an amazing 60.3 percent in 2013.
• In addition to slimming down this winter, the Giants' Pablo Sandoval got instruction from Miguel Cabrera on his right-handed swing, CSNBayArea.com's Andrew Baggarly reports. "See if they can command the fastball in, because that tells you a lot," Sandoval said when asked what advice he received. "And early in the count, get a pitch to drive."
• Nationals third baseman Ryan Zimmerman discussed his throwing problems with Adam Kilgore of The Washington Post, commenting, "it’s hard to explain to people that have never played baseball." The early-season cold weather isn't helping matters, but Zimmerman hasn't felt right since 2012 shoulder surgery, which affected his mechanics. "I don’t like really saying things about [the issue] … everyone who plays baseball has something like that," Zimmerman said.