If the product was a football orientated clock / football shaped clock, then football clock / ball clock is ok specifically for this concept. I can't get around "football o'clock", personally
A brand surrounding the readiness, time, information ...or other use related to football, the following alternatives would be more accepting, in my opinion
FOOTBALL TIME
BALL TIME
FOOTBALL NOW
BALL NOW
GO FOOTBALL
GO BALL
FOOTBALL DAILY
BALL DAILY (DAILY BALL)
BALL247
BALL365
(Or similar)
Alternatively, if you had just "O Football" (Oh, Football!) / O Ball (Oh, Ball!) ...the "oh" indicating a range of emotions, it would be a pass, for me ...or even in your case, a quirk on "o'clock"
ofootball.com ...fine
oball.com ...fine