Suns 'shocked' by collapse against Celtics in OT loss

It shouldn’t have come down to that possession at the end of regulation.

Phoenix had this one in the bag.

The Suns led by 17 points with seven minutes left, but they allowed Boston to come back and put itself position to tie the game and force overtime with 6.1 seconds left.

Then, Marcus Morris, a former Sun, did just that in knocking down an open 3 from the top of the arc with .03 seconds left off a pick-and-pop with Kyrie Irving.

Five minutes later, the chant of “LET’S GO CELTICS” rained through Talking Stick Resort Arena to signal more than just a 116-109 Boston win.

The Suns gave this one away.

“We just got comfortable,” Suns guard Devin Booker said. “Instead of putting a team away, we gave…