Of course the major link is the character John Munch - he was a regular on Homicide a cop show based in Baltimore base on a book by David Simon the creator of the Wire. Munch was featured in crossover episodes of Law and Order ( his chemistry with Jerry Orbach was hilarious) - and when the spin-off SVU was created the character John Munch portrayed by Richard Belzer was part of the elite unit. He also had a cameo on the Wire.
Wrestling tie-in - Belzer had Hulk Hogan and Mr T on his talk show during the build-up to the first WrestleMania - Belzer asked Hogan to try a hold on him. Hogan put a headlock on Belzer and it knocked out the comedian/actor. Belzer sued WWF and Hogan because of the incident.