San Francisco 49ers: 5 players who’ll need bounce-back years in 2019

SANTA CLARA, CA - NOVEMBER 12: Ahkello Witherspoon #23 of the San Francisco 49ers reacts to a call during their NFL game against the New York Giants at Levi's Stadium on November 12, 2018 in Santa Clara, California. (Photo by Ezra Shaw/Getty Images)
SANTA CLARA, CA - NOVEMBER 12: Ahkello Witherspoon #23 of the San Francisco 49ers reacts to a call during their NFL game against the New York Giants at Levi's Stadium on November 12, 2018 in Santa Clara, California. (Photo by Ezra Shaw/Getty Images) /
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SANTA CLARA, CA – OCTOBER 07: Christian Kirk #13 of the Arizona Cardinals is tackled by Adrian Colbert #27 of the San Francisco 49ers after a catch during their NFL game at Levi’s Stadium on October 7, 2018 in Santa Clara, California. (Photo by Thearon W. Henderson/Getty Images)
SANTA CLARA, CA – OCTOBER 07: Christian Kirk #13 of the Arizona Cardinals is tackled by Adrian Colbert #27 of the San Francisco 49ers after a catch during their NFL game at Levi’s Stadium on October 7, 2018 in Santa Clara, California. (Photo by Thearon W. Henderson/Getty Images) /

No. 4: Safety Adrian Colbert

Many of the 49ers’ second-year players regressed in 2018, and it’s impossible to leave safety Adrian Colbert off that list.

San Francisco 49ers
San Francisco 49ers /

San Francisco 49ers

A season removed from Colbert’s impressive rookie debut in 2017 — one which helped him solidify the Niners’ starting free safety job entering last year — Colbert struggled mightily with improper coverage and tackling angles, eventually winding up as Pro Football Focus’ worst-graded starting safety, per KNBR 680’s Brad Almquist.

Colbert, of course, suffered a high-ankle sprain in Week 7 against the Los Angeles Rams, which landed him on injured reserve. It’s anyone’s guess whether or not Colbert would have improved his starting stock over the second half of 2018. But as things stand now, he has a long ways to go to ensure he returns to any starting job this season.

The Niners used seven different safeties over the course of the year, so this position is anything but guaranteed. If San Francisco makes a run at Seattle Seahawks pending free-agent safety Earl Thomas this offseason, Colbert’s prospects for starting grow extremely dim.

Still, that doesn’t mean he’ll be without a vital role in 2019.

He just needs to revert back to those impressive 2018 efforts.