Obstruction Call

[largeone59]

I posted this situation on another forum, so i'd like to hear your opinions too.

My partner called obstruction on this play. I'd like to hear all of your input on this.

R1 stealing on the pitch. Catcher throws the ball down to second. F4 and F6 are both near the bag, but F4 was the one taking the throw and F6 was a step or two off the bag toward third. The throw is high over their heads and sails into center field. R1 rounds the base (2 or 3 steps) and runs into F6. F6 goes down in a heap since R1 was much bigger and F6 was a scrawny guy. R1 trots back to the base as the throw from F8 comes in.

My partner calls obstruction on F6 and gives R1 third.

Is this the correct call under OBR?

Under FED?

Should this have just been a 'no call'?