Gambill had two RBIs for the Indians, and Campbell threw 80 pitches in his six-inning shutout.
Other Indians' hitters were Campbell, one hit (walk, RBI, run); Hunter James, one hit (walk, RBI, run); and Noah Daniel, one hit. Harrison Heath walked twice, Alan Thacker walked once and scored a run, Dax Edwards and Brandon Walker each scored a run and Thacker Lively was hit by a pitch.
Parker Cagle had the only hit for the Colts. Connor Wall, Chris Mills and Jordyn Mitchell all walked once.
Pitchers for the Colts were Seth Smith (three innings, three strikeouts), Britton Rice (two innings, three strikeouts) and Mills (two innings, three strikeouts).
Below are results from other games on opening day.
Padres 15, Crackers 3
Rodrick Winburn (double, walk, three RBIs, run) had two hits for the Padres, and Sean Holton (two hits, two runs), Brycen Jones (one hit, two walks, three runs), Jacob Frye (one hit, triple, one run) and Zachery Taylor (one hit, walk, run) also added hits.
Dawson Dysart (two runs), Garrett Geros (two runs) and Kurtis Feanny (hit by a pitch, two runs) walked twice, and LaDarius Winburn (run) and Jaylen Knowles each walked once.
Jones pitched two innings with three strikeouts, Dysart went two innings with two strikeouts and Frye pitched one inning.
Pitchers for the Crackers were Thomas Watkins (two innings, five strikeouts), Preston Martin (one inning, one strikeout), Blake Adams (two innings, three strikeouts) and Levi Pickle (one inning). Joshua Mayo (one hit, home run, RBI, run), Martin (one hit, triple, RBI), Watkins (one hit, double, run), Adams (one hit), Austin Lunde (one hit, run) and Asa Plummer (one hit, walk) provided the team's hits.
Tigers 6, Dodgers 3
Jake Cooper drew three walks and scored two runs in the Tigers' three-run win. John Reed Evans (walk, hit by a pitch, run) and Tate Mathis (walk) also walked while Grant Harris (one hit, double, walk, run), Gage Morris (one hit, double, walk, run, two RBIs) and Ant McNair-Seigler (one hit, run) grabbed hits. Nick Pedrick added an RBI on a fielder's choice.
Cooper went three innings with five strikeouts, Evans pitched two with one strikeout, and Harris and Mathis both struck out three in two innings.
Dodgers' hits came from Curtis Wilkes (one hit, RBI), Thomas Jolly (one hit, run) and Juan Guerrero (one hit, walk, RBI, run). Alex Hassinger (two walks), Reese Brideau (hit by a pitch, run), Spencer Dickey (walk), Austin Clark (walk) and Max Rohland (walk) also reached base.
Dickey pitched two innings with three strikeouts, and Trevor Lawrence struck out four in four innings.
Phillies 9, Braves 3
Phillies' hitters Dayne Roberts, Jake Norris and Nick Root all doubled, and Blane Belisario tripled in the team's win on Saturday.
Belisario added a walk and two runs, and Root scored a run. Josh Holmes (one hit, walk, two runs), Khase Willis (one hit, hit by a pitch, two runs), Trace Still (one hit, hit by a pitch, two runs), Bailey Belisario (one hit, run) and Reece Thompson (walk) reached base as well.
Jake Hacker pitched four innings with three strikeouts, Willis went three innings with one strikeout and Josh Holmes pitched one inning.
Crawford Taylor had two hits with a double for the Braves; Landen Woods also had two hits with a double; Garet Cornett had one hit; Mitch Brown had one hit with a run; John Walker Knowles had one hit; and Bradley Sutton had one hit with two walks and two runs.
Baylor Agan walked twice, and Brody Faulk and Taylor McDaniel, who scored a run, both walked once.
Tanner Jordan (four innings, two strikeouts), Woods (two innings, one strikeout) and McDaniel (one inning) pitched for the Braves.