Defensive tackle
Haloti Ngata tweaked his hamstring during his conditioning test and missed the first practice of training camp on Thursday.
The injury isn't believed to be serious and the
Ravens are exercising precaution with Ngata.
"We're going to take it slow and make sure he's OK," coach John Harbaugh said.
Also absent from practice on Thursday were wide receiver
David Reed (ACL), offensive lineman
Kelechi Osemele (back), offensive lineman
Jah Reid (calf) and defensive end
Pernell McPhee (knee). With those four still out of practice, there have been no changes to the PUP list.