3:18 PM PT -- Cops are now on the hunt for the man who attacked Myles Garrett, TMZ Sports has learned.
Here's what we now know ... the Cleveland Police Dept. was called to the scene to respond to the attack, which took place in Downtown Cleveland around 2:55 PM on Wednesday.
Garrett told police he was on the phone in his car when a man in a 2007 Chevy Cobalt pulled up next to him and asked for a pic. Garrett told the man to hold on while he finished his call but eventually agreed to a pic.