Jefferson announced Tuesday through his personal Twitter account that he is coming out of retirement to play one more year.
Jefferson retired from the NBA on Saturday, Mark Stein of The New York Times reports.
Jefferson averaged 1.5 points, 0.9 rebounds and 0.8 assists during his 18th NBA season with the Nuggets in 2017-18.
Jefferson (wrist) is not on the injury report for Friday's game against the Spurs, T.J. McBride of Mile High Sports reports.
Jefferson will not play in Thursday's game against the Bucks due to wrist soreness, Harrison Wind of BSNDenver.com reports.
Jefferson will likely join the Nuggets' regular rotation for the remainder of the season, Chris Dempsey of Altitude Sports reports. Coach Michael Malone says he liked what he saw from Jefferson on Friday and wants to see "what we have" in him.
Jefferson played two minutes in Wednesday's 134-111 win over the Suns, turning the ball over once and accruing no other statistics.
Head coach Michael Malone said Thursday that Jefferson won't start the season in the Nuggets' rotation, Harrison Wind of BSN Denver reports.
Jefferson is unlikely to be available for Wednesday's regular-season opener against the Jazz, Harrison Wind of BSN Denver reports.
The Nuggets are expected to sign Jefferson to a one-year, $2.3M deal, Adrian Wojnarowski of ESPN reports.