The New York State Public High School Athletics Association or the NYSPHSAA divides the state of New York into 11 geographic sections. Pearl River High School plays baseball in Section I of the NYSPHSAA. This highly competitive, very successful Section includes many strong public school athletic programs as well as two private, parochial schools. 
 
New York City schools are not part of th NYPSHSAA and thereby do not participate in the state baseball championship series. The Long Island sections consisting of Section 9 (Nassau County) and Section 11 (Suffolk County) have decided not to participate in the NYSPHSAA state baseball championship series either.

All schools are currently divided into classes, determined by the student enrollment population size of the entire school. In October of each year, the enrollment of grades 9, 10 and 11 are combined to determine the "classification placement for the following baseball season as the seniors will have graduated and the juniors, sophomores and freshmen then will have moved up a grade and are eligible to play varsity baseball. NYSPHSAA attempts on a statewide basis to have an equal number of schools in each classification (AA, A, B, C and D) and therefore periodically reviews cutoffs delineating classifications."

There are 61 high school baseball teams in Section I. Pearl River participates in Section I League III-C. The Section is broken down as follows:

LEAGUE I - 16 TEAMS
League I-A
Mamaroneck Tigers
Mt. Vernon Knights
New Rochelle Huguenots
Scarsdale Raiders
White Plains Tigers

League I-B
Clarkstown North Rams
Clarkstown South Vikings
East Ramapo Titans
North Rockland Red Raiders
Suffern Mounties

League I-C
Carmel Rams
Mahopac Indians

League I-D
Gorton Wolves
Lincoln Lancers
Roosevelt Indians
Saunders Blue Devils

LEAGUE II - 16 TEAMS
League II-North
Brewster Bears
Hen Hud Sailors
Lakeland Hornets
Ossining Athletics
Panas Panthers
Peekskill Red Devils
Yorktown Huskers

League II-South
Fox Lane Foxes
Harrison Huskies
Horace Greeley Quakers
John Jay Indians
Nyack Indians
Port Chester Rams
Somers Tuskers
Tappan Zee Dutchmen
Yonkers Bulldogs

LEAGUE III - 19 TEAMS
League III-A
Briarcliff Bears
Croton-Harmon Tigers
Kennedy Catholic Gaels
Pleasantville Panthers
Putnam Valley Tigers
Westlake Wildcats

League III-B
Ardsley Panthers
Byram Hills Bobcats
Eastchester Eagles
Edgemont Panthers
Pelham Pelicans
Rye Garnets
Woodlands Falcons

League III-C
Albertus Magnus Falcons
Hastings Yellow Jackets
Irvington Bulldogs
Nanuet Golden Knights
Pearl River Pirates
Sleepy Hollow Headless Horsemen

LEAGUE IV - 10 TEAMS
League IV-North
Haldane Blue Devils
Keio Unicorns
North Salem Tigers
Valhalla Vikings

League IV-Central
Blind Brook Trojans
Bronxville Broncos
Greenburgh Academy
Rye Neck Panthers
Solomon Schechter Lions
Tuckahoe Tigers