Answer:

BACKS

Answer	Crossword Clue
BACKS	Puts money on
BACKS	Puts up money for, as a play
BACKS	Stands behind

BACKS	Places for pats
BACKS	Supports
BACKS	Helps (a start-up) start up
BACKS	Pigskin carriers
BACKS	Behind-the-line men
BACKS	Invests in
BACKS	Ball carriers
BACKS	Endorses

BACKS	Campaigns for
BACKS	Drives in reverse, with "up"
BACKS	Bankrolls
BACKS	Upholds.
BACKS	Football players.
BACKS	Section of a football team.
BACKS	Gridiron players, behind the line.
BACKS	Members of a football team.

BACKS	Endorses.
BACKS	Gridiron players.
BACKS	Bets on
BACKS	O.J. et al.
BACKS	Spines
BACKS	Subsidizes
BACKS	Reverse sides
BACKS	Is an angel to

BACKS	Puts up the cash
BACKS	Lends support
BACKS	Sponsors
BACKS	Soccer positions
BACKS	Remove a mistake, in a way