MLB Player News

Hader, 22, has a 6.05 ERA and 49:23 K:BB through 38.2 innings at Triple-A.

After dominating the competition at Double-A to begin the year, Hader has battled control problems en route to a bloated ERA through eight starts at Triple-A. In fact, he has walked at least three batters in five of those eight outings. The strikeout numbers continue to make him a high-upside hurler, but any notion of him seeing the big leagues in 2016 has likely been put to rest.

Matzek was promoted to Double-A Hartford on Friday, Patrick Saunders of the Denver Post reports.

Matzek missed time earlier in the season due to some performance anxiety, but it seems that he's doing well enough to advance to the next stage of the minor leagues. The left-hander's 4.71 ERA wasn't very impressive during his time with High-A Modesto, especially for a reliever, so he'll have to figure some things out if he wants to get back up to the Triple-A level before the conclusion of the season.

Guerra, 20, is batting an abysmal .198/.262/.324 with nine home runs, 39 RBI and four steals through 100 games for High-A Lake Elsinore.

Dealt as part of the Craig Kimbrel trade in the offseason, Guerra has struggled to make consistent contact in 2016. Guerra has fanned an astounding 132 times over those 100 games, as his prospect status has clearly taken a hit.

Smith made his first appearance with the Giants on Tuesday, giving up two runs on two hits over one-third of an inning in a loss to the Phillies.

Smith entered a tie game in the eighth inning and gave up back-to-back hits after striking out Freddy Galvis. He was lifted for Sergio Romo who promptly allowed both runners to score as well as three runs of his own. It wasn't the debut Smith or the Giants were hoping for, but he should continue to appear late in games for the club down the stretch. Moving from a losing club in Milwaukee to a team in the playoff race should increase his opportunities to rack up holds.

Kiekhefer was recalled from Triple-A Memphis on Wednesday.

As expected, Kiekhefer will come up to fill the roster spot vacated by lefty Tyler Lyons, who hit the DL with a stress reaction in his right knee. Kiekhefer has pitched 13 innings for the Cardinals on the season, posting a 4.85 ERA and 1.15 WHIP. He's fared better at the Triple-A level, where he holds a healthy 2.00 ERA across 27 innings.

Kiekhefer will be recalled from Triple-A Memphis to take Tyler Lyons' spot in the bullpen, Jenifer Langosch of MLB.com reports.

With Lyons moving to the disabled list with a stress reaction in his knee, Kiekhefer may get a chance to enjoy an extended stint in the majors. He's posted a 4.85 ERA and 1.15 WHIP across 13 innings pitched for the Cardinals, and a 2.00 ERA and 1.22 WHIP in 27 innings at the Triple-A level this season.

De La Rosa (elbow) threw 40 pitches to rehabbing teammates A.J. Pollock and Chris Herrmann on Tuesday, Jake Rill of MLB.com reports.

The 27-year-old De La Rosa, who's been out since May 25, used his fastball, slider and changeup during the session. Diamondbacks manager Chip Hale said De La Rosa may throw batting practice one more time before heading out on a rehab assignment.

Chapman tossed a clean ninth inning with a strikeout for his second save Tuesday against Miami.

After blowing his first save as a Cub on Saturday, Chapman bounced back in fine fashion to record the save in his first opportunity since then. He has recorded at least one strikeout in each of his first five relief appearances for the Cubs as he remains arguably the toughest pitcher to hit in the league.

The Phillies promoted Rodriguez to Triple-A Lehigh Valley on Tuesday, Mike Drago of the Reading Eagle reports.

A roster spot opened up with the promotion of Luis Garcia to Philadelphia. Rodriguez was 7-0 with a 2.57 ERA and a 41:16 K:BB in 49 innings for Double-A Reading and held lefties to a .197 average. He could get a look in the Phillies' pen in September.

Chafin made his first rehab appearance, pitching a scoreless inning with two strikeouts, MLB.com Associate Jake Rill reports.

Chafin has really struggled this season for the Diamondbacks after a stellar 2015 campaign in Arizona. Chafin can be a useful reliever for the Diamondbacks if he can come back and prove he's healthy. Chafin could return to the Diamondbacks bullpen as soon as next week.