Bystrom, 23, has appeared in six games for the AHL’s Texas Stars this season, recording one goal.
The six-foot, 175-pound native of Ornskoldsvik, Sweden, has played in 138 career AHL games, producing five goals and 31 assists for 36 points to go with a plus-14 rating.
Originally a second-round draft pick by Dallas in 2012, Bystrom was a member of the Farjestad BK club that participated in the 2014 AHL All-Star Classic.
Scarlett, 24, has one goal and one assist in 13 AHL games with the Springfield Thunderbirds this season.
A fifth-year pro, Scarlett has appeared in 229 career AHL games with Springfield and Albany, totaling 18 goals and 77 assists for 95 points.
The 6-foot-1, 185-pound native of Edmonton, Alta., was originally selected by New Jersey in the sixth round of the 2011 NHL Draft.