Na (62) comfortable at Colonial: I can contend on '7 or 8' courses

There are 46 total events on the 2018-19 PGA Tour calendar, and Kevin Na feels like he can contend in about "seven or eight" of them.

The Charles Schwab Challenge is one of those tournaments.

Na signed for a bogey-free, 8-under 62 Friday, opening with an eagle and following up with six more birdies. At 8 under for the week, he was just one back of leader Jonas Blixt at the end of the morning wave.

Coming off a fourth-place finish last year, Na has carded 62 or better in three of his last six rounds at Colonial.

"Yeah, I like this golf course," he said. "One of those golf courses I look forward to coming to. Fits my game. I've got a good record. You've got to take advantage of those weeks…