Brief look at second round of PGA Championship

A look at the second round of PGA

CHASKA, Minn. — A brief look at Friday’s second round of the 91st PGA Championship at Hazeltine National Golf Club (all times EDT):

Leading: Tiger Woods by four shots at 7-under 137.

Trailing: Vijay Singh and Padraig Harrington, among a group of five players at 3 under.

Who else?: Six other players were under par, including Ernie Els, Lee Westwood and Ian Poulter.

Key statistic: Woods is 8-0 while leading at the midway point of a major championship.

Noteworthy: The top 12 players on the leaderboard come from nine different countries.

Quoteworthy: “It’s not bad to have a day off. Hopefully I’ll see him again on Sunday.” — Padraig Harrington on not playing with Tiger Woods in the third round.

Key groupings: 2:22 p.m. — Ross Fisher, Padraig Harrington; 2:40 p.m. — Tiger Woods, Vijay Singh

Television: 11 a.m-2 p.m. TNT; 2-7 p.m. CBS.