49ers add another familiar receiver option in Aldrick Robinson

SANTA CLARA, Calif. -- Much as with at quarterback, the San Francisco 49ers' makeover of the wide-receiver position is nearly complete. The team agreed to a deal with former Atlanta Falcons wideout Aldrick Robinson on Thursday night, making him the third receiver from another team to join up on the first day of free agency and the fourth wideout overall to sign with San Francisco in the span of about a week.

Earlier Thursday, the 49ers announced the signings of receivers Pierre Garcon and Marquise Goodwin. San Francisco re-signed Jeremy Kerley before free agency. Robinson now joins a mix that should offer coach Kyle Shanahan more versatility and options than the group that struggled mightily for San Francisco in 2016.

Terms: Two years, money not yet known.

ESPN 150 ranking: Unranked.

Grade: C. Robinson's experience working with Shanahan in Atlanta and Washington gives the 49ers yet another skill-position player familiar with the scheme. Robinson's production to this point in his career (50 catches for 931 yards in 52 games) won't blow anyone away, but he knows the offense and won't be asked to do too much assuming the Niners get what they hope from the likes of Garcon, Goodwin and Kerley. Coincidentally, Robinson had his best performance last season against the Niners, finishing with four catches for 111 yards in Week 15. As a fourth wideout who still has a little bit of upside and should increase the level of competition in training camp, this move is OK.

What it means: One would assume the 49ers are done shopping for wide receivers, at least when it comes to free agency. Adding a talented young wideout in the draft should be a strong consideration, but if nothing else the 49ers have bolstered this group with a trio of players who bring varied skill sets and a little more experience than the bunch that was in place before free agency. If healthy, a unit that features Garcon and Goodwin on the outside with Kerley in the slot and Robinson off the bench isn't likely to dominate, but it's a clear upgrade from last season.

What's the risk?As with Goodwin, it's hard to imagine this deal will be costly, which means there isn't much risk from a financial standpoint. In Robinson's case, the bigger concern is whether he would be able to produce if thrust into a more significant role. Robinson was out of football altogether in 2015 as he dealt with a knee injury. Robinson has never caught more than the 20 passes he did last season, and though he knows the offense, he's never proved capable of handling a starting job. Without much depth behind Garcon, Kerley and Goodwin and acknowledging Goodwin's injury history, the Niners could be left thin at receiver if they don't develop more of the receiver on the current roster.