The American League Division Series opens Saturday at 1 p.m. ET when the Chicago White Sox visit the Cleveland Guardians at Progressive Field. The game airs on TBS, with streaming on truTV and HBO Max under TNT Sports' AL package. Cleveland hands the ball to 25-year-old left-hander Parker Messick, who posted a 2.56 ERA with 193 strikeouts in 186 1/3 innings over 32 regular-season starts.

Chicago counters with left-hander Hagen Smith, the same young arm who opened the White Sox's Wild Card win over Houston with three scoreless innings. That outing matched Smith's longest major-league start, so Chicago is expected to lean on a deep bullpen after his exit. Messick's breakout year has him in the Rookie of the Year conversation; Saturday is his first postseason start.

Cleveland earned a first-round bye as a top AL seed. The White Sox swept into the Division Series and now face a rested Guardians club at home in an early window that sets the tone for the series. Best-of-five formats punish early mistakes: a Game 1 win buys rest and matchup flexibility for the staffs.

Backstory: Messick's regular-season command made him Cleveland's clear Game 1 choice alongside Gavin Williams for Game 2, per Guardians announcements. Chicago's Wild Card path already showed a willingness to mix short starts and relievers.

Where to watch: TBS / HBO Max, 1 p.m. ET Saturday; first pitch at Progressive Field.

What we know:
Messick is named for Cleveland in Game 1. Smith is expected to open for Chicago. Time and TV window are locked for 1 p.m. ET on TBS/HBO Max.

What we don't:
How deep Smith works before the White Sox bullpen takes over, and final lineup cards until managers post them.

Preview only until the final out. Messick and Smith are the named arms; Progressive Field's early window on TBS and HBO Max is the place to watch Game 1 unfold.