So rarely does a trade occur in the NBA that visibly improves both teams’ rosters. Courtney Lee for Jerryd Bayless was such a trade. Courtney Lee provides the wing shooting that the Grizzlies have been missing since Quincy Pondexter smashed his foot into a thousand pieces. Meanwhile, Jerryd Bayless can play some point guard for a Celtics team that still has no true PG other than Rondo, who is dead. Somewhat of a “scratch my back and I’ll scratch yours” situation, except instead of back-scratching, it’s an exchange of role-playing guards. When in Rome…