Brian Campbell is on the web.com tour. He just had a top-5 finish last week.
Thomas Detry is playing in Europe.
Luke Guthrie is back on the web.com tour.
Of course, Mike Small is playing on the Champions tour now.
I started trying to keep up with it a few years back, especially as the Illini pool continues to grow. Here's what I got (let me know if anyone's missing):
Stricker, Points, Pieters - PGA Tour
Pieters, Detry - European Tour (Pieters is members of both)
Langley, Campbell, Guthrie - Web.com (Langley is crushing it, he willl promote to PGA next year)
Stricker, Small - Champions (Strick goes back and forth)
Danielson is still on the Mackenzie tour (I think), hasn't played in a while
Lipparelli shows up on the European Challenge Tour sometimes (including this week)
Meyer and Hardy will play on exemptions this summer as they push for status. Hopefully both play the JDC.
Affrunti and DeForest used to play events, but haven't in a couple years or so.
You'll also see current Illini players during the summer. O'Reilly tried to qualify for one this week. Gio is playing on the challenge tour this week. I recommend looking everyone up on the OWGR website, you can see what events they've played recently.