Last Thursday I took a look at several movers and shakers at the Triple-A level, so this week, Double-A is the focus. This is the level of the minor leagues where boys can become men and also the place where big league dreams can be shattered. Many scouts believe that succeeding in Double-A is a great barometer of future success in the majors. Below are several names to keep an eye on as they look to continue their success this season—or turn things around before it’s too late.

Eastern League

Dylan Cozens and Rhys Hoskins are tied at the top of the Eastern League leaderboard with 19 home runs each. Teammates for the Reading Fightin’ Phils, neither Cozens nor Hoskins is viewed as an elite prospect. With that said, both players have a future in the big leagues based on their power potential alone. Hoskins may be more of a platoon player while Cozens has more upside as his success in 2015 has translated quite well at Double-A this year. Both players could see the majors in in mid-to-late 2017.

It won’t be long before David Dahl gets a promotion to Triple-A. A top prospect in Colorado’s system, Dahl is slashing .283/.375/.528 with 13 homers and 15 steals. Depending on what Colorado does at the trade deadline, it’s possible that Dahl could receive a late season call-up to Colorado. He’s going to be a big-time producer playing half of his games at Coors Field.

On the flip side, another top Rockies prospect currently at Double-A Hartford is Ryan McMahon—and he is struggling. Over 226 at-bats this year, he’s batting just .212 with three home runs. In his last 10 games, McMahon is batting .135. Yikes. He won’t be getting a promotion anytime soon.

Remember the name Matt Carasiti. He’s another Hartford Yard Goat and he’s been the team’s closer since the beginning of 2015, recording 41 saves over that time period. After three years of failure as a starting pitcher, the Rockies organization moved him to the bullpen and he has done excellent. Carasiti is a potential setup man or closer in the future and he’s worth a stash if you play in a very deep dynasty league.

Southern League

Tyler O’Neill is one of the premier power hitters in the Southern League with 12 home runs to date, but his plate discipline improvements are the real story. Last season, O’Neill struck out 137 times while walking 29 times in 449 plate appearances. So far this season, in 298 plate appearances, he’s already drawn 28 walks. He strikeout number sits at 68, but he’s made big strides in improving his overall approach at the plate. He’s a potential late-2017 call-up for the Mariners.

The Reds promoted LHP Amir Garrett recently after he stifled the competition in the Southern League. Garrett made 13 appearances (12 starts) for Pensacola and posted a 1.75 ERA, 1.03 WHIP and 78 strikeouts in 77 innings pitched (9.1 K/9). His first start at Triple-A Louisville was a mixed bag, but that can be written off as nervous jitters considering he walked six batters, something very uncharacteristic of Garrett. He’ll be a fixture in the Reds’ rotation next year.

Another Southern League arm that was recently promoted is Josh Hader. The lanky lefty was even more dominant than Garrett in Double-A, striking out 73 batters in 57 innings pitched. Over five minor league seasons, his K/9 stands at 10.1 and that should translate quite well at the big league level. Since being promoted to Triple-A Colorado Springs, Hader has made three starts, two of which were solid. He pitched on Tuesday and gave up six earned runs in three innings. If he can get into a groove, the Brewers could give Hader a late season call-up.

When Diamondbacks prospects are brought up, one name rarely mentioned is Anthony Banda. The lefty had a strong 2015 campaign at High-A Visalia and has turned around and posted even better numbers at Double-A Mobile. His ERA stands at 2.12 and he’s striking out more than a batter an inning (9.9 K/9). Banda’s BB/9 are up from 2.3 to 3.3 from last year and that could be an issue down the line if he doesn’t improve, but so far it hasn’t hurt him. If Banda continues to perform at this level, he will be heavily discussed in offseason prospect rankings.

Texas League

Alex Bregman has been mentioned in the archives of this very column on numerous occasions, so if you’re a regular reader, you know how much I’ve clammed over him. He was hit in the head with a pitch a couple of days ago, but stated via Twitter that he was fine. Bregman returned to action on Tuesday night and is now batting .302 with 14 homers at Double-A. He’s a candidate to reach the majors by season’s end.

Bubba Starling was a former top-50 prospect, but is coming dangerously close to being declared a full-on bust. He is batting just .188 over 229 plate appearances at Double-A Northwest Arkansas and hasn’t been able to break through in any meaningful way. Luckily, Starling is only 23 years old and still has some time to turn things around.