Blake_24 :
I have most the parts for a build left over from a previous build that could possibly be repurposed for a friend to get his first desktop build. Could this CPU really play much these days. I know it won't play really any AAA games but mostly for things like rocket league and overwatch. It will most likely be paired with a GTX 660 or GTX 760 anyways so it doesn't need to keep up with really fast GPUs
You should be fine for Overwatch -- minimum is a Phenom X3 8650 (http://us.battle.net/support/en/article/7636), & it's supported all the way back to GeForce 400 series GPUs (minimum being the GTX 460). Just make sure you're running 64-bit Windows (7 or higher). That CPU is 5 tiers higher (http://www.tomshardware.com/reviews/cpu-hierarchy,4312.html). You may not be able to get near the 150-200FPS mark with your hardware, but I would imagine that 60+FPS performance is more than doable (& quite possibly even available with high quality settings).
Rocket League is probably similar. If it can be played with the Core 2 Quad Q6600 (https://www.techspot.com/article/1313-intel-q6600-ten-years-later/page3.html), which is 2 tiers below your Phenom II, then you should have no problems.
Basically, as long as you meet the minimums for a game, you should be fine. I wouldn't expect too much from AAA games of the past year, as they finally started getting to the point of requiring FX CPUs for AMD systems, but other than that you are probably OK.