Rookie glance: TE Mychal Rivera

How acquired: Sixth-round draft pick (No. 184 overall) out of Tennessee

2013 season: At 6-feet-3, Rivera made up for his relative lack of height with an uncanny athleticism as a pass catcher. Technically, he started only three games but played in all 16. He became a go-to pass catcher for Raiders quarterbacks in the second half of the season as 27 of his 38 catches and three of his four touchdown receptions came after Week 8. Veteran Jeron Mastrud was Oakland's starting tight end but he only caught seven passes, or 96 yards, and fellow rookie tight end Nick Kasa was more of a special teams player. Rivera's run-blocking needed work, as it does for most rookies on offense.

Looking ahead: Mastrud is scheduled to become an unrestricted free agent and unless the Raiders go out and get Jimmy Graham, Rivera should be the Raiders' starting tight end in 2014. An offseason of refining his blocking techniques should be in order for Rivera, who would be lethal were he two inches taller. He was already the Raiders' best pass-catching tight end as he averaged 10.7 yards per catch but also had six receptions of at least 19 yards.

The Raiders' other 2013 rookies who finished the season on the roster: RB Latavius Murray, TE Nick Kasa, LB Sio Moore, OT Menelik Watson, CB D.J. Hayden, DE Ryan Robinson, CB Chance Casey, S Shelton Johnson, WR Greg Jenkins, OG Lamar Mady, QB Matt McGloin, WR Brice Butler and DT Stacy McGee.