• The Pirates have placed John Holdzkom on release waivers, a week after the righty was designated for assignment.  Holdzkom went from independent baseball to a key role in the Bucs’ bullpen in 2014, recording a 2.00 ERA and 14 strikeouts in nine relief innings (his first and, to date, only taste of MLB action) to help Pittsburgh reach the postseason.  Holdzkom battled injuries, a loss of velocity and control issues in 2015, however, and he pitched only 24 1/3 innings of minor league ball.
• The Angels selected the contract of left-hander Greg Mahle and optioned A.J. Achter to Triple-A in a corresponding move, the club announced.  (The Angels already had a 40-man roster spot open, so no further transactions were necessary to add Mahle.)  A 15th-round draft pick in 2014, Mahle has a 2.97 ERA, 10.8 K/9 and 4.00 K/BB rate over 97 career minor league relief innings.  The 2016 Baseball America Prospect Handbook ranked him as the 13th-best prospect within the Halos’ thin farm system, noting that Mahle delivers his pitches from three different arm angles, including a sinking fastball that ranges from 85-94mph depending on from where Mahle is throwing it.  He also has a plus changeup.
• The Diamondbacks outrighted Kyle Drabek to Triple-A after the righty went unclaimed, MLB.com’s Steve Gilbert reports (via Twitter).  Drabek signed a minor league deal with the D’Backs during the offseason and pitched in one game for the club before being designated for assignment last Friday.  The 18th overall pick of the 2006 draft, Drabek has struggled at the big league level and also battled injuries, most notably two Tommy John surgeries.  Drabek has only thrown 12 2/3 innings over the last four seasons.
• The Lancaster Barnstormers of the independent Atlantic League have signed left-hander Phil Coke and right-hander Ryan Kelly, Jason Bristol tweets.  Coke threw 12 2/3 innings with the Cubs and Blue Jays last season, and has also since signed minor league deals with the A’s and Braves.  The veteran southpaw was released by Atlanta during Spring Training.  Kelly was also released by the Braves during the offseason, ending a three-year stint in the organization.  Kelly made his Major League debut last season, posting a 7.02 ERA over 16 2/3 innings out of Atlanta’s bullpen.

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Carpenter (not to be confused with the former Angels reliever also named David Carpenter who briefly pitched for the Braves last year) was a key part of the Braves’ bullpen in 2013 and 2014. The Braves sent him and Chasen Shreve to the Yankees for Manny Banuelos prior to the 2015 season, but Carpenter pitched for only two months in New York and was ultimately shipped to Washington. For the year, he posted a 4.01 ERA, 5.5 K/9 and 3.3 BB/9 in 24 2/3 innings, also struggling with shoulder trouble. The Braves signed him to a minor-league deal in November.

The 28-year-old Kelly made it to the Majors in 2015, his ninth year in pro ball. He allowed 14 runs in 16 2/3 innings with the Braves but fared very well in the minors, posting a remarkable 0.77 ERA, along with 9.2 K/9 and 2.5 BB/9, in 47 innings split between Double-A Mississippi and Triple-A Gwinnett. The Braves’ decision to release him this early in camp seemingly reflects a belief that he won’t be able to carry over his minor-league success to the big leagues, but given his minor-league success, he’ll surely get a chance elsewhere.

Martinez, 26, has been added to Texas' 40-man roster. The right-handed hitter appeared in 22 games with the Friars in 2011, hitting .203/.309/.305 in 68 plate appearances.

Kelly, 24, was a 26th-round pick of the Pirates in 2006. He has a 4.50 career ERA over five minor league seasons.