I asked Sam Miller, who writes about the Angels for the Orange County Register, if he could provide any further scouting on Richards:
"4-seamer in mid/upper 90s to righties; 2-seamer to lefties gets tons of grounders; occasional plus slider; so-so curve and change ... strikeout rate nothing special, but he can get in a strikeout roll and do double-digits. Very loose comp: Chatwood w/control."
Tyler Chatwood, by the way, is set to make the start on Thursday against Bartolo Colon. As for Richards, his stuff looks pretty nasty. I'll probably have a post on THT Live tomorrow with a PITCHf/x recap of his debut.
Also, read Miller's post on Richards from this morning.