Upon the final cuts from a year ago, the 49ers settled on six wide receivers on the team's 53-man roster: Michael Crabtree, Mario Manningham, Randy Moss, Ted Ginn, Kyle Williams and A.J. Jenkins.
Crabtree and Manningham were the team's best receivers. Manningham's season ended in Seattle in late-December when he sustained tears to his ACL and PCL in his left knee. He is not expected to be ready for the start of training camp on July 24, but is hopeful he'll be ready to go when the regular season opens more than six weeks later.
Crabtree will not count against the 53-man limit to open this season, as he is likely to be designated for return while on injured reserve for a torn right Achilles tendon. There's a chance the 49ers can get him back after 10 to 12 regular-season games.
Coach Jim Harbaugh brushed off the suggestion the 49ers will seek veteran help in light of Crabtree's injury. Anquan Boldin is the clear No. 1 receiver, a position he held with the Super Bowl-champion Baltimore Ravens last season. Manningham is the only other receiver option who has experienced much success in the NFL.
[RELATED: Maiocco -- Replacing Crabtree is not a one-man job; could Moss return?]
Kyle Williams, returning from an ACL tear of his own, has averaged slightly more than one catch a game in his 29 career games with 35 receptions for 461 yards and four touchdowns.
"We're excited for the young receivers that we have," Harbaugh said. "(I) really feel that somebody's going to emerge there because they have to. And competition will create that. And we'll look forward to watching that."
The 49ers invested their first-round pick on Jenkins a year ago. He spent the entire season on the 53-man roster, but did not catch a pass. Last month, the 49ers used a fourth-round selection on Quinton Patton of Louisiana Tech.
There are three other players on the 49ers' 90-man roster with previous NFL experience:
--Chad Hall (5 foot 8, 187) is a slot receiver and potential punt-returner. He was promoted to the active roster for the NFL championship game and Super Bowl, but did not catch a pass. He had 14 catches for 135 yards and two touchdowns in 2010 and '11 for the Philadelphia Eagles.
--Ricardo Lockette (6-2, 211) has tremendous speed. Like Hall and Jenkins, he spent a lot of time in the offseason working out with quarterback Colin Kaepernick in Atlanta. had two catches for 105 yards and a touchdown for the Seattle Seahawks in 2011 before spending most of last season on the 49ers' practice squad.
[RELATED: 49ers all in on 'next man up' philosophy]
Marlon Moore (6-0, 190) spent three seasons with the Miami Dolphins, catching 12 passes for 244 yards and two touchdowns. The 49ers signed him in the offseason after the Dolphins declined to tender him as a restricted free agent.
Here's a complete look at the 49ers' current 90-man roster after one week of organized team activities, including number at each position currently on roster and number at each position the 49ers kept on their initial 53-man roster last season:
Running backs (10/6)
Wide receivers (11/6)
Tight ends (5/3)
Offensive line (15/8)
LT Joe Staley
LG Mike Iupati
C Jonathan Goodwin
RG Alex Boone
RT Anthony Davis
Defensive line (12/7)
Outside linebackers (6/3)
Inside linebackers (6/4)
K Phil Dawson
P Andy Lee
LS Brian Jennings
LS Kyle Nelson
LS Kevin McDermott