After four practices in pads, the injuries are beginning to pile up for the Patriots, making it a busy training camp for rehabilitation director Joe Van Allen.

Here's a snapshot look at the health of the roster as the team is set to practice Thursday afternoon (1:30-4 p.m.):

FB Tony Fiammetta -- He last practiced on Sunday, and was not spotted on the field for Tuesday's or Wednesday's sessions. No word on his absence.

WR Brandon Lloyd -- On Tuesday, Lloyd was part of a group of players doing post-practice stretching/ab work, and on Wednesday, he was not on the field for the in-stadium practice.

WR Deion Branch -- On Saturday, the team's first day in pads, Branch joined the post-practice stretching/ab work group. On Tuesday, he did not participate in teams drills. On Wednesday, he was on the field for the start of practice but later left the field.

WR Jeremy Ebert -- The rookie remains on the active/physically unable to perform list, recovering from a leg injury suffered in minicamp. He has been on the field for most practices as an observer, while working with the training/strength staffs.

TE Visanthe Shiancoe -- On Sunday, Shiancoe was in uniform but did not participate in team drills. On Tuesday, Shiancoe did not take part in practice, joining the group of rehabbing players. He was not spotted on Wednesday.

TE Daniel Fells -- Fells has yet to practice since signing in New England, and remains on the active/physically unable to perform list with a leg injury.

TE Jake Ballard -- Recovering from an ACL tear suffered in the Super Bowl, Ballard hasn't been spotted and remains on the active/physically unable to perform list, where he is virtually guaranteed to start the regular season.

G Logan Mankins & T Sebastian Vollmer -- Both players remain on the active/physically unable to perform list. Mankins is recovering from offseason ACL surgery, while Vollmer is rehabbing from a previous back injury. The duo typically are seen rehabbing during practice, and later watching team drills from the sideline.

G/C Nick McDonald -- McDonald remains on the active/physically unable to perform list with an undisclosed injury.

T Markus Zusevics -- The rookie is still recovering from a pectoral injury suffered at the NFL Combine, and remains on the active/non-football injury list.

G/C Jamey Richard -- Richard left Sunday's practice with a concussion and was not spotted on the field for Tuesday's or Wednesday's sessions.

T Matt Kopa -- He left Wednesday's session limping after suffering an injury during 11-on-11 work.

G/C Dan Connolly -- The veteran missed his first practice of training camp on Wednesday. No word on his absence.

DE Rob Ninkovich -- He has been in uniform, but has not participated in positional contact or team drills since Saturday, dealing with an upper body injury.

DT Jonathan Fanene -- He missed Wednesday's in-stadium practice for undisclosed reasons.

DT Myron Pryor -- Has been spotted doing rehab work doing most practices, but remains on the active/physically unable to perform list recovering from last season's shoulder injury.

LB Tracy White -- After missing all offseason practices recovering from a sports hernia procedure, White left Saturday's practice, the team's first session in full pads, and has not been spotted since.

CB Alfonzo Dennard -- The rookie did not finish Friday's practice with a hamstring injury, and has since been seen rehabbing with trainers.

S/CB Will Allen -- The veteran missed his first practice of training camp on Wednesday evening. No word on his absence.

S Nate Ebner -- Coach Bill Belichick confirmed that the sixth-round pick passed his physical at the start of training camp, but he has yet to practice. For most practices, Ebner has been spotted rehabbing from an unknown injury.