Flynn has managed the pass rush and turned the ball over less than incumbent Tarvaris Jackson and rookie Russell Wilson, the magazine said after watching a practice session open to the media during organized team activities last week.
Flynn, 26, signed a three-year, $26 million deal in March after four years as a backup with the Green Bay Packers.
Jackson, 29, started 14 games last season for the Seahawks, completing 60.2 percent of his passes for 3,091 yards, 14 touchdowns and 13 interceptions.
The Seahawks selected Wilson in the third round of the NFL draft and have been publicly committed to a competition for the starting spot between the three.
Head coach Pete Carroll had each quarterback split first-team reps during OTAs.