Younger trainees -- high school freshmen and sophomores -- can effectively do a novice progression during sports specific training, because their recovery capacity is such that sports training will not interfere with strength gains. Most other athletes will need a different approach.
A novice linear progression doesn't take that long to do, a few months at most, and most athletes benefit quite a bit from being significantly stronger. Given this, I feel as though it makes good sense to approach a linear novice progression in the off-season, when sports-specific training will not interfere with what will be an extremely important addition to athletic ability. Once this is accomplished and strength levels have increased to the point where linear progress slows, the athlete is an intermediate lifter and strength training can be effectively integrated into sports-specific training without compromising important initial strength acquisition.