Four pool games are scheduled for Thursday in the Miami Chevrolet Supercenter Wood Bat Tournament.
Joining host Miami in Pool A are Grove, Jay and Ketchum while Oologah and three Missouri schools - Ozark, Springfield Parkview and Willard - will be in Pool B.
Ketchum and Willard kick things off at 11 a.m. Thursday.
Miami's pool games are against Oologah at 3 p.m. Thursday, with Parkview at 5 p.m. Friday and against Ozark at 1 p.m. Saturday.
The third-place game will be Sunday at 2 p.m. with the title game at 4 p.m.
Oologah's high school team reached the semifinals of Oklahoma's Class 4A state tournament, losing to eventual runner-up Berryhill.
Ketchum qualified for the Class 2A state tournament for just the third time in school history with a win over Wyandotte in the regional final.
The Warriors lost in the first round.
Willard's high school squad is playing in the Missouri Class 4 semifinals, meeting Parkway North in Springfield on Friday.
Miami has split its first two games of the Legion season, beating Vinita before losing to Jay.