Wieck was recalled from Triple-A El Paso on Tuesday.
Wieck will get his first taste of the majors after El Paso was knocked out of the PCL playoffs over the weekend. The 26-year-old southpaw, who was added to the team's 40-man roster in the offseason to protect him from the Rule 5 draft, impressed during his time on the farm this season, posting 2.53 ERA, 1.14 WHIP and 70:17 K:BB across 46.1 innings split between Double-A San Antonio and El Paso.
The Padres optioned Wieck to Triple-A El Paso on Sunday.
Wieck was added to the Padres' 40-man roster over the winter following a season in which he held opposing batters to a .221 average over 38.2 innings across three levels. The 26-year-old will presumably fill a key role in the El Paso bullpen for the bulk of the upcoming campaign and could earn a look from the Padres at some point if the club is in need of another lefty reliever.