SURPRISE, Ariz. - Derek Holland has missed most of the last two seasons with injuries and according to one model, he ranks as one of the highest risks for needing Tommy John surgery this coming year.

The model, developed by Bradley Woodrum and the staff at MLBtraderumors.com, attempts to quantify the risk factors for an ulnar collateral ligament injury. Holland ranks sixth on the list of all MLB pitchers, based partly on the fact he is left-handed (the study finds a significantly higher percentage of left-handed pitchers require Tommy John than do right-handers).

According to Woodrum, his model:

"While most efforts at quantifying TJS risk have focused on recent appearances or recent pitches, our research takes a step further back and examines injury risks on an annual basis," the report said,.

According to the study, San Diego's Brandon Morrow, who missed the final three months of last season with elbow inflammation, is the most likely to require surgery. He is followed by Cleveland's Josh Tomlin, Oakland's Jesse Hahn, the New York Mets Erik Goeddel and Tampa Bay's Drew Smyly.

Holland missed the first months of 2014 with a leg injury that required surgery. He missed most of last year dealing with shoulder issues.

Briefly: RHP A.J. Griffin, who is trying to resurrect his career after two years of fighting back from Tommy John surgery, has stopped throwing off a mound. He is not having pain but is working on ironing out a kink in his delivery to try to get more downward movement on pitches. ... With RHP Yovani Gallardo officially signing with Baltimore, the Rangers will receive the 30th overall pick in the June draft as compensation. The spot also comes with an allotted slot value of approximately $2 million, which will raise the Rangers' draft bonus pool to more than $7.5 million. ... RHP Luke Jackson is not doing any throwing off the mound because of lower back stiffness. Jackson has experienced the soreness at the start of spring training regularly as a professional as he gets used to being back on spikes.