The Patriots announced Saturday that have signed offensive lineman Thomas Welch from the practice squad to the 53-man roster and released safety Ross Ventrone. Welch was signed from the practice squad to the 53-man roster on September 12 prior to the season-opener at Miami and saw his first NFL action against the Dolphins. He was released from the 53-man roster on September 14 and signed to the practice squad on September 15. For more Patriots news, check out

Here are 10 matchups worth keeping an eye on in Sunday’s Patriots-Raiders game:

FOXBORO -- Aaron Hernandez (knee) and Sebastian Vollmer (back) were ruled out of Sunday's Patriots game after both missed practice on Friday, while defensive tackle Albert Haynesworth (back) and cornerback Ras-I Dowling (hip) were listed as questionable. Both Dowling and Haynesworth did not participate in practice on Friday. The team released its practice report on Friday afternoon before leaving for Oakland in the afternoon for Sunday's game against the Raiders. Here’s the complete Friday injury report for the Patriots.

FOXBORO -- Patriots cornerback Ras-I Dowling was missing from the start of practice on Friday, joining Albert Haynesworth, Sebastian Vollmer, Mike Wright and Aaron Hernandez as players not on the field as the team prepares for the Raiders in Oakland on Sunday afternoon. 

Dowling was limited on Wednesday and Thursday with a hip injury before missing Friday while Haynesworth (back), Vollmer (back), Wright (concussion) and Hernandez (knee) have all been out of practice this week. 

FOXBORO -- When asked about Richard Seymour, Hue Jackson doesn’t mince words.

FOXBORO -- Defensive tackle Albert Haynesworth missed practice on Thursday with a back problem, but offensive lineman Logan Mankins was back in a limited role after missing Wednesday’s practice with an illness. Here’s the complete Thursday injury report for the Patriots:

FOXBORO -- After missing Wednesday with an illness, Patriots starting left guard Logan Mankins returned to the practice field on Thursday as the team worked out in shorts and shells in preparation for the Raiders this Sunday in Oakland. 

FOXBORO -- Patriots safety Patrick Chung says he'll be ready to play this weekend in Oakland if coach Bill Belichick and the medical staff deem him fit enough to play with a surgically-repaired right thumb. Chung missed practice time last week and then was held out against the Bills as Buffalo exploited the secondary in the second-half comeback that led to a 34-31 win over the Patriots.

"I can play. I'll be ready to play and if coach wants me out there, I'm out there," said Chung on Thursday.

FOXBORO -- With the departure of linebacker A.J. Edds to the Indianapolis Colts, the Patriots filled his practice squad spot on Wednesday by bringing back defensive end Alex Silvestro and signing the rookie to the practice squad.

FOXBORO -- Defensive tackle Albert Haynesworth returned to Patriots practice on Wednesday but Logan Mankins was a no-show due to illness as the Patriots began their on-field preparation for the Raiders in Oakland on Sunday afternoon. Here's the rest of the Patriots injury report for Thursday:

Did Not Practice

OG Logan Mankins (illness)
TE Aaron Hernandez (knee)
OT Sebastian Vollmer (back)
DL Mike Wright (concussion)

Limited Participation
CB Kyle Arrington (chest)