The Chicago Bears have signed receiver Demetrius Fields along with defensive tackles Corvey Irvin and Christian Tupou while reaching a contract agreement with cornerback Maurice Jones.
They also announced Monday they released linebacker Dom DeCicco and cornerback LeQuan Lewis.
Fields, Irvin, Tupou and Jones had tryouts during Chicago's minicamp this past weekend.
A rookie from Northwestern, Fields had 114 receptions for 1,203 yards and seven touchdowns during his college career.
Irvin has appeared in 18 games over three seasons with the Carolina Panthers (2010), Jacksonville Jaguars (2011) and Tampa Bay Buccaneers (2012) and has 11 tackles.
Tupou, a Southern California product, went undrafted and unsigned in 2012. He had 53 tackles for the Trojans.
Jones, a rookie, appeared in 46 games for Temple.