River Islands Athletics

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Josiah Mattes

Josiah Mattes

Grade12
Height5'7
Weight225

Year	Team (s)	#	Positions (s)
2025	Football	55	OL,DL

River Islands Athletics

16601 Riptide Way

Lathrop, California 95330

(209) 717-6715

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Home
Teams
Schedule & Results
Athletic Department
- Athletic Dept Info
- Coaching Staff
Athletic Clearance
Apparel
Game Tickets

Badminton
Baseball

Schedule Roster
Basketball, Boys

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Basketball, Girls

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Cheer

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Cross Country, Boys

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Cross Country, Girls

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ESports

Schedule
Flag Football, Girls

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Football

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Golf, Boys

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Golf, Girls

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Soccer, Boys

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Soccer, Girls

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Softball

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Swimming & Diving, Boys

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Swimming & Diving, Girls

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Tennis, COED

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Track & Field, Boys

Schedule Roster
Track & Field, Girls

Schedule Roster
Volleyball, Boys

Schedule Roster
Volleyball, Girls

Schedule Roster