Swanigan's alma mater, Purdue, announced in a statement that the 25-year-old passed away Monday.
Swanigan is opting out of the NBA's resumption in Orlando, Jamie Hudson of NBC Sports Northwest reports.
Swanigan is uncertain about participating in the NBA's restart in Orlando, Blazers reporter Erik Gundersen reports.
Swanigan will get the start at center for Friday's matchup with the Jazz, Casey Holdahl of the Trail Blazers' official site reports.
Swanigan had seven points (3-6 Fg, 1-2 FT), 10 rebounds and two assists in 21 minutes during Tuesday's 127-99 loss to the Nuggets.
Swanigan is expected to see a solid chunk of minutes Thursday against Dallas, Mike Richman of The Oregonian reports.
Swanigan is expected to be available for the Trail Blazers' next game Thursday versus the Mavericks after his trade to Portland became official Tuesday.
Swanigan (not injury related) won't be available Monday for Portland's game against the Warriors.
Swanigan has been traded from the Kings -- along with Trevor Ariza and Wenyen Gabriel -- to the Trail Blazers in exchange for Kent Bazemore, Anthony Tolliver and two second-round picks.
Swanigan was recalled from the G League on Saturday.