One was a prior high draft pick. Center Chris Watt was the third round pick of the Chargers in 2014. He ended last year on the PUP.
Two have one year experience but that was on a teams IR. Guards Tayo Fabuloje and Jordan Walsh.
There are a bunch rated as top five hundred prospects by NFL.COM.
Matt Davis QB SMU
Dominique Hatfield CB Utah
Jon Toth C Kentucky
Salamo Fiso LB Arizona State
Michael Dunn T and Will Likely CB Maryland
Likely and Toth were invited and passed physicals but are both recovering from injuries.
The nineteen invites are more than double the teams invites from previous years but their UDFA numbers are down as well. Part of this may be due to the team being at the 90 player roster limit. My guess is the team has players to cut but wanted to see them workout first. There are already two spots opened from two players failing physicals.
My prediction is Watt, Likely and Matt Davis make the teams 90. If I had to guess Dunn, Toth and Hatfield are next.
Surprise player could be Shakeir Ryan. Northwestern State. 5'8" 161 lbs but his speed is off the charts. Reports on Twitter are he showed well yesterday.
