Shawn Stefani keeps Tampa Bay Championship lead

Shawn Stefani has retained his lead at the top of the leaderboard on day two of the Tampa Bay Championship in Florida.

The American PGA Tour rookie followed up an opening round of 65 with a 70 on Friday to move him one shot clear on seven-under-par.

Australia's Adam Scott and South Korean KJ Choi are both on six-under, while Stefani's fellow countryman Jason Dufner is joined by four others on five-under.

Spaniard Sergio Garcia and American Tad Ridings are a shot further back, but England's Luke Donald carded a 72 to give him a score of even-par.