Object Ball
Obstruction
Octuple Scull
Odd-Man Rush
Off-Speed Pitch
Off Spin
Offensive Foul
Offensive Guard
Offensive Line (OL)
Offensive Rebound
Offensive Rebounds Per Game
Offside
Oklahoma Drill
Ollie
Olympic Goal
Omega Curve
On-Base Percentage (OBP)
On-Base Plus Slugging Percentage (OPS)
On-Deck
On The Bench
On The Ropes
One-And-Done
One-And-One
One Timer
One Touch
One Two (Trick)
Onodi
Onside Kick
Open Break
Open Goal
Open Table
Opposite Field Hit
Organized Team Activities (OTAs)
Orthodox
Out-Turn
Out Route
Outfield Assist
Outfield Fence
Outfielder
Outlet Pass
Outside Hitter
Outside Linebacker (OLB)
Outside Corner
Over
Over-And-Back Violation
Over The Back
Over The Limit
Over/Under
Overdraw
Overhead Pass
Overkill
Overstable
Overthrow
Own Goal
