Back to a dead heat at Colonial

UPDATE: With a second consecutive birdie, Jason Dufner pushed back into the lead at minus-16 after six holes, one stroke ahead of Zach Johnson, and right back where they started the final found.

FORT WORTH, Texas -- We're all tied up at minus-15 through five holes at the Crowne Plaza Invitational at Colonial.

Zach Johnson took over the lead on No. 2 and Jason Dufner has come back to tie things up on No. 5 with an 8-foot putt for birdie while Johnson made par, his fourth consecutive par.

Johnson's course record of 21-under remains under attack.

This remains strictly a two-horse race. Tommy "Two Gloves" Gainey has made a nice run, going 4-under through nine to get to minus-8. John Huh is minus-6 through six and Tom Gillis is minus-6 through five holes.