So in a year you put on 20 pounds of pretty much all muscle? That's ideal. You're still lean-ish (ignoring the bodyfat measurement, just going by the pics), so I'd stay mostly on track (no pun intended) and keep doing what you're doing.
What's your training and diet look like?
How're your legs? I'm hoping you're training them seriously and not using "I used to run, so they're already well built" as an excuse.