The 35-year-old, who spent four seasons out of basketball from 2013 to 2016, also signed a training-camp deal with the Sixers in 2017 but was waived before the start of the regular season.
Okafor briefly latched on with the Delaware Blue Coats—Philadelphia's G League affiliate—and later signed a deal with the New Orleans Pelicans to provide them with depth after DeMarcus Cousins suffered a season-ending Achilles tear.
In 26 appearances (19 starts) with New Orleans, the 2004 No. 2 overall pick averaged 4.4 points and 4.6 rebounds per game with a 16.4 player efficiency rating.
Barring injuries to the Sixers frontcourt, Okafor remains a long shot to crack the final 15-man roster.
Stats courtesy of Basketball Reference.