Oakland Athletics outfield prospect Colby Thomas recently joined Triple-A Las Vegas and has begun to showcase his elite power potential. In his past six games, the Mercer product has posted a .348/.464/.783 slash line with an eye-catching 1.247 OPS. In this stretch, Thomas has launched three long balls with one double and tallied eight RBI. He only went one game in this stretch without tallying at least one hit. Overall, through his first 13 games at Triple-A, the 23-year-old has held a strong .327/.417/.596 line. The number 11 ranked prospect in the Oakland system on MLB Pipeline has progressed through the minor leagues very quickly after needing just 54 games at High-A and 59 games at Double-A to reach the top level of the minors. Thomas has a strong chance of making his major league debut in the second half of the season and could become a popular stash candidate in redraft leagues if he continues this power run.

St. Louis Cardinals starting pitching prospect Quinn Mathews looked quite sharp in his Double-A debut as he tossed 5 1/3 innings of two-run ball (both unearned) with just one hit, three walks, and three punchouts. Mathews has been one of the best young arms in the minor leagues this season as he posted a stellar 2.68 ERA, 0.76 WHIP, and 9:58 BB:K through 43 2/3 innings at High-A earlier this summer. While his strikeout numbers were a bit low in his first look at Double-A, dynasty managers should not need to worry. The former fourth-round selection from Stanford has been one of the biggest risers on prospect rankings this season and could reach the major leagues as soon as next year due to how well he has produced this season. The 23-year-old southpaw remains a must-stash in dynasty formats.

Oakland Athletics catcher prospect Daniel Susac was 4-for-5 with two homers and five RBI for Double-A Midland on Monday. The 23-year-old is hitting .289 with five homers and 23 RBI at Midland this season. The Athletics' No. 5 prospect was dialed in during June with a .340 batting average during the month and that production transitioned into the first game in July. The 2022 first-round pick of Oakland could be their catcher of the future. He could be looking at an MLB debut by next season if he continues to progress and is a name to monitor at a thin fantasy position.

Milwaukee Brewers pitcher Bryse Wilson was tagged by the Colorado Rockies in Monday's 8-7 loss, allowing five runs (all earned) and seven hits over four innings. Wilson replaced opener Rob Zastryzny in the second inning and immediately allowed homers to Charlie Blackmon and Brenton Doyle while striking out three and walking two. He is now 5-3 with a 4.27 ERA and 1.28 WHIP, striking out 62 and walking 28 over 78 innings. Wilson's penchant for allowing dingers has been an issue, as he's allowed 14 homers. Monday's outing marked the fourth time in six outings that Wilson has yielded at least three earned runs, so now is a good time for fantasy managers to bail on him.

New York Mets pitcher David Peterson pitched well enough to earn a win yet finished with a no-decision in Monday's 9-7 loss at the Washington Nationals. Peterson recorded his third quality start after allowing two earned runs on seven hits over 6 1/3 innings with two strikeouts and a walk. Peterson is 3-0 with a 3.51 ERA and 1.44 WHIP, striking out 22, and walking 14 in 33 1/3 innings. Fantasy managers looking for wins might consider adding Peterson, but his overall numbers make him risky. However, his next start is scheduled for Saturday at the Pittsburgh Pirates, making him a good, but not great, streaming option.