Super Bowl XLIX -- Horny Fans Burning Up Tinder

There will be tons of scoring OFF the football field in Arizona this weekend ... cause TMZ Sports has learned that the dating app Tinder is BLOWING UP with randy pigskin fans looking for some tight ends.

We spoke to our Tinder sources (we have them) and they tell us ... since Wednesday activity in the Phoenix area -- where the game is being played -- has "tremendously spiked."

We're also told ... with 300,000 people expected for the big game some type of upswing is normal -- with other sporting events like the World Cup and Olympics (hello Olympic village) seeing the same thing -- but they can't explain why usage shot up so far ahead of the big event this time.

We might have an idea ...

Tiger Woods happens to be playing in the Phoenix Open this week. #JustAThought.