Josh Rosen Honors Todd Heap's Daughter with $300 Tip!

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).

Rosen answered the call and after a $94 sushi meal in Manhattan Beach, CA -- he dropped a $300 tip for the staff. Pretty cool.

And he also wore pink.

Heap played for the Arizona Cardinals in 2011 and 2012 after spending 10 seasons with the Baltimore Ravens.