Stryker Corp. (NYSE:SYK) is fielding legal challenges on two fronts, one from a former distributor and DePuy Spine and another from a Utah man claiming a Stryker pain pump destroyed his shoulder. DePuy and BioInitiatives Inc., a former Stryker Spine distributor, asked a California judge for an injunction barring Stryker from enforcing a non-competition clause in the now-expired deal with Roseville, Calif.-based BioInitiatives. Under California law, the Johnson & Johnson (NYSE:JNJ) subsidiary and the sales agent argued, would violate California’s ban on non-compete agreements.