adversary
amateur athlete
antagonist
archer
associate
athlete
ballplayer
baseballer
baseman
batter
battery
battler
belligerent
belted knight
bickerer
blade
blocking back
bowman
bravo
brawler
bully
bullyboy
catcher
center
coach
combatant
competition
concurrent
confederate
contender
contestant
corrival
cricketer
defensive lineman
disputant
duelist
emulator
end
enforcer
entran
entrant
fencer
feuder
field
fighter
fighting cock
foilsman
champ
champion
comer
enemy
favorite
favourite
finalist
foe
front-runner
king
queen
runner-up
scratch
second best
semifinalist
street fighter
tier
tilter
title-holder
world-beater
ally
buyer
candidate
colleague
customer
employer
investor
manager
neighbors
opponent
participant
partner
player
politician
rival
supplier
supporter