Every athlete.
Every season. One record.
Roster is the registration, eligibility, and athlete-history engine of SidelineOS. Built around the way weight-tier youth football, age-cutoff baseball, and division-based flag actually work — not the way a generic registration tool wishes they worked.
10U Division · STARS
224 ATHLETES · 96% ELIG · 8 PROSPECTSRegistration is the
operator's first failure point.
"Is he too heavy?"
TYSA-style weight caps need enforcement at registration, before the first practice, with a documented audit trail. Most tools either ignore weight or check it once and forget.
"Is he the right age?"
Every league has a date math problem. Generic registration tools punt on it. Roster bakes the league rules in — and flags the kid who's a week off cutoff before the parents complain.
"Who's still on the fence?"
Every program has a pipeline of "maybe." Most tools don't track them. Roster turns the maybe pile into a working CRM — by division, with status, with the parent's phone number.
What Roster does.
Parents register.
The system enforces.
A parent-facing registration flow that captures everything the program needs — and rejects everything it shouldn't accept. Weight, age, guardian, emergency contact, medical, photo release. All structured. All audited.
- Parent self-serve registration on web or mobile
- Conditional questions by sport and division
- Payment integration with auto-receipts
- Waiver capture with signed timestamps
Weight tier. Birth cutoff.
Enforced.
Roster runs every athlete through your league's eligibility ruleset on registration and again before every game. The rules live in the system. The exceptions are documented. The audit trail is automatic.
- League-specific rule packs (TYSA, NFL FLAG, AAU, custom)
- Weight re-checks scheduled per division policy
- Cross-roster checks: no athlete in two age tiers
- Approved exceptions logged with reason + approver
The "maybe" pile,
working for you.
Every program loses athletes who never finished registering. Roster captures them, scores them, and routes them to the right outreach — so the pipeline doesn't leak.
- Capture interested parents from web form, event, or referral
- Tag by division target, source, and follow-up status
- Auto-assignment to a coach or registrar for outreach
- Convert to active athlete with one click when registration completes
Six modules. One operating system.
SidelineOS is modular. Start with what you need. Add the rest as we ship them. Your account scales, your data stays.
Locker
Track every piece of gear, tie it to an athlete, run check-in/check-out from your phone.
Roster
Registration, weight-tier eligibility, division placement, full athlete history across seasons.
Schedule
Field allocation, practice blocking, tournament brackets, and game-day scheduling.
Score
Field-number login, scoreboard sync, whistle and horn audio, halftime countdown, crash recovery.
Comms
Targeted messaging by team, division, or full league. Built for the operator tired of GroupMe sprawl.
Field
Field availability, conflict detection, weather cancellation flow, and facility partnership management.
Built in the field.
Not the office.
SidelineOS isn't a thesis. It's a tool I needed. I run a 1,340-athlete program across six divisions. Every module on this page started as a workflow I had to solve before Saturday. The fact that other operators need the same thing is the business — but the design pressure came from the field, not a focus group.
Numbers a competitor can't fake.
SidelineOS runs daily inside an active program. Here's what that program looks like.
Stop reconciling spreadsheets.
Get on the Roster early-access list. Q3 2026. Built on the eligibility logic of a 1,340-athlete program — not the assumptions of a generic registration tool.