We’ll use this post to track any notable 40-man roster additions that crop up as teams settle upon their Opening Day rosters:

The D-backs announced that they’ve selected the contract of right-handed reliever J.J. Hoover. He’ll fill the 40-man spot that was vacated earlier today when Christian Walker was sent outright to Triple-A. Hoover, 29, inked a minor league deal with the Snakes this offseason after spending parts of the past five seasons — the entirety of his Major League career — with the Reds. Hoover opened the 2016 season as Cincinnati’s closer but quickly lost that job and experienced a rapid decline that ultimately led to his outright off the 40-man roster. As recently as 2015, however, the righty tossed 64 1/3 innings of 2.94 ERA ball with 7.3 K/9 against 4.3 BB/9. Hoover will walk his fair share of batters (career 4.2 BB/9 rate), but he’s also punched out 240 hitters in 242 1/3 Major League frames. As a rather extreme fly-ball pitcher, he may find Chase Field more problematic than some pitchers, though he’s no stranger to homer-friendly parks, thanks to his time in Cincinnati.

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