Arizona Cardinals rookie QB Josh Rosen left a fat ass tip after a sushi date with his mom ... and it's all to honor the late daughter of ex-Cardinals tight end Todd Heap.
Tragically, Heap's 3-year-old daughter Holly passed away last year after a car accident at the family home in Arizona.
To honor her memory, the Heaps started Hugs From Holly Day on May 3 -- and encouraged people to spread love and joy in their community with a random act of kindness.
The Heaps also asked people to wear pink (Holly's favorite color).