Friesen, the former Nebraska star in his first full season on the Nationwide Tour, had an 11-under 205 total on the Bob Charles-designed Clearwater course. Barnes, the leader after each of the first two rounds, shot a 71, and Alker had a 67.
Danny Lee, the New Zealand amateur who won Johnnie Walker Classic last month, shot a 69 to top a group at 9 under. The 18-year-old Lee, also the U.S. Amateur champion, plans to turn pro after the Masters. Born in South Korea, he moved to New Zealand at age 8.
Fellow New Zealander David Smail (68) also was 9 under along with Americans Ryan Hietala (69) and Craig Bowden (70) and Australias Stephen Dartnall (68).
The tournament also is sanctioned by the Australasian tour.