Yes Sportsfan was not the same as SEN/One on One/Sp. News/Yahoo...
Wiki.:
>>The Sports Fan Radio Network was a sports talk radio network that existed from 1996 through 2001, when it abruptly folded.In 2001, however, the network began facing intense pressure from upstart network Fox Sports Radio, which had the major backing of industry giant Clear Channel Communications. Determining that the network could not compete with ESPN, Fox, and One on One Sports, Sports Fan Radio Network began dismantling. Donnellan was immediately fired one week before the Super Bowl, leaving J. T. the Brick as one of the few remaining hosts, hosting two live shifts plus replays throughout the day. The network folded in May 2001, ceding most of its affiliates to Fox.
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The entry for Sports Fan says they also had Pete Rose, whom I remember hearing on WRKO (10-mid.?)
Wiki says SEN (Sports Ent. Network) became One on One (93-01) then Sporting News (till '11) and is now Yahoo
whereas, see above, Sports Fan folded and supp. many affiliates went to Fox Sports.