All over Twitter from former teammates. Apparently, heart attack. RIP QG54
http://www.bigcatcountry.com/2016/10/15/13293810/quentin-groves-passes-away-at-the-age-of-32Former Jacksonville Jaguars defensive lineman Quentin Groves reportedly suffered a heart attack and passed away on Saturday. He was 32 years old.
Groves was discovered to have Wolff-Parkinson-White syndrome during the 2008 NFL Combine, which resulted in him having a rapid heartbeat. Groves had minor surgery going into the 2008 NFL Draft and he was selected in the second round (52nd overall) by the Jaguars, who traded up to get him.
After two seasons in Jacksonville and just 2.5 sacks, he was traded to the Oakland Raiders for a fifth-round pick in the 2010 NFL Draft. He bounced around the league and last played with the Tennessee Titans in 2014. (He was a part of the Buffalo Bills during the 2015 offseason, but was released before the regular season began.)