Connor William Sadzeck (born October 1, 1991) is an American professional baseball pitcher who is a free agent.

He has previously played in Major League Baseball (MLB) for the Texas Rangers, Seattle Mariners, and Milwaukee Brewers.

[1] Sadzeck made his professional debut in 2012 with the Low-A Spokane Indians and he spent the whole season there, going 1–4 with a 4.06 earned run average (ERA) in 15 games.

[2] Sadzeck spent 2015 with both the High-A High Desert Mavericks and Double-A Frisco RoughRiders, posting a combined 3–2 record and 5.82 ERA in 60+1⁄3 innings pitched.

[10] Sadzeck made 23 appearances for the Triple-A Charlotte Knights in 2021, registering a 2-2 record and 5.86 ERA with 18 strikeouts across 27+2⁄3 innings pitched.

He was assigned to the Triple-A Nashville Sounds, for whom he made 17 appearances down the stretch, logging a 3.18 ERA with 21 strikeouts over 17 innings pitched.

[14] Sadzeck pitched in 17 games for the Triple-A Rochester Red Wings, posting an 0-3 record and 3.86 ERA with 21 strikeouts in 21.0 innings of work.

[18] In 49 relief appearances for the Triple-A Indianapolis Indians, he compiled a 4-3 record and 4.66 ERA with 67 strikeouts and 9 saves across 63+2⁄3 innings pitched.