The Mariners optioned Kowar to Triple-A Tacoma on Tuesday.

Kowar had allowed four runs over 2.1 innings covering his last three relief appearances. He'll head to Tacoma for now but could get another opportunity in the Seattle bullpen later on this season.

The Mariners selected Lao's contract from Triple-A Tacoma on Tuesday.

Lao was removed from the 40-man roster earlier this season after making one relief appearance, but he's earned his way back on with a 1.37 ERA over his last five outings at Tacoma. The 26-year-old will likely be used in low-leverage spots.

The Astros recalled VanWey from Triple-A Sugar Land on Tuesday, Matt Kawahara of the Houston Chronicle reports.

VanWey has a 6.23 ERA and 5:3 K:BB over 8.2 frames during his time with the big club this season. He's absorbing the 26-man active roster spot vacated by Tayler Scott, who was designated for assignment.

The Astros designated Scott for assignment Tuesday, Matt Kawahara of the Houston Chronicle reports.

Scott was bludgeoned for five runs over 1.2 innings in his lone appearance after the Tigers called him up Monday. He's clearing out to make room on the roster for Logan VanWey.

The White Sox recalled Peguero from Triple-A Charlotte on Tuesday.

Peguero has made one appearance for the White Sox since they claimed him off waivers from the Brewers earlier this month, yielding one run over 1.2 innings. He'll work in middle relief.

The White Sox Sox" data-type="SPORTS_OBJECT_TEAM" data-league-abbreviation="MLB" data-team-abbreviation="CHW">White Sox placed White on the 15-day injured list Tuesday due to a right hip impingement.

White evidently suffered the injury in a relief appearance in Monday's 13-9 win over Atlanta, during which he allowed four runs while recording just one out. The White Sox haven't provided a timeline for his return from the IL.

The Red Sox recalled Bernardino from Triple-A Worcester on Tuesday.

The Red Sox are swapping left-handed relievers, with Jovani Moran heading back to Worcester and Bernardino rejoining the big club. Bernardino has collected a 3.09 ERA but a less appetizing 36:22 K:BB over 43.2 innings with Boston this season.

The Astros will recall VanWey from Triple-A Sugar Land prior to Tuesday's game in Detroit, Ari Alexander of KPRC 2 Houston reports.

VanWey will provide a fresh bullpen arm for the Astros. The 26-year-old holds a 6.23 ERA and 5:3 K:BB over 8.2 frames during his time with the big club this season.

Mederos (0-1) allowed three runs on nine hits and three walks while striking out three over five innings to take the loss versus the Reds on Monday.

Mederos gave up a two-run home run to Gavin Lux in the first inning, and the Angels were never able to overcome that early damage. Over his first two big-league starts, Mederos has allowed six runs on 12 hits and six walks across nine innings. He'll need to cut down on the baserunners to have a chance to be more effective in a starting role. Should he get another start, he is tentatively projected for a home outing versus the Cubs this weekend.

Smith allowed one run on a hit and a walk while striking out two over one inning to earn the save in Monday's 3-1 win over the Diamondbacks.

Smith entered Monday on a 10-inning scoreless streak, but he allowed an RBI triple to Geraldo Perdomo in the ninth inning, though he was able to strand the Arizona shortstop 90 feet from home. Smith has performed admirably since taking over the closer role from Emmanuel Clase, who is on non-disciplinary leave. Smith now has seven saves on the year, four of which have come in August. He's added a 2.73 ERA, 1.09 WHIP and 76:19 K:BB through 56 innings this season.