Age of Sentry
Agents of Atlas (and related projects, like Gorilla Man mini, Namora one-shot, Avengers vs Atlas mini, and a mini with Wolverine)
Dark Reign: The Hood mini
Fall of the Hulks
a bunch of Hulk (circa 2011) & Red She-Hulk
a few issues of Incredible Hercules
Exiles (2009) and X-Men First Class, too, but those aren't connected to anything relevant.
All of his runs are worth picking up. He has put out some excellent work. Red Hulk was pretty when Loeb was on it, but otherwise substantially better once Parker took over and was highly underrated. Goes without saying that his Agents of Atlas work is simply stellar.
In summary, if you see Parker's name, ime of the mind you should pick it up and check it out.