Matthews is 6'2" and a 4.4 guy. He's a flanker. Gil Brandt, Senior Analyst for nfl.com had this to say about Matthews’ pro day:
“Matthews really blew my socks off. He ran the 40-yard dash in 4.44 and 4.48 seconds, and stayed on his vertical from the combine.
http://www.finsmob-exoduss.com/2012/05/21/rishard-matthews/
He measured 72 inches at the combine and ran a 4.62.
He can man the Z, but I think he has the skillset to be a dynamic weapon in the slot for this team one day.