Johnson scored a goal and added a fighting major in Tuesday's 4-3 shootout win over the Sharks.
Johnson logged an assist and two PIM in Saturday's 6-3 loss to the Flames.
Johnson signed a one-year, $1 million contract with the Flyers on Monday, per Elliotte Friedman of Sportsnet.
Johnson scored a goal on two shots in Tuesday's 2-1 loss to the Capitals.
Johnson (illness) will be in the lineup versus Tampa Bay on Saturday, Jackie Spiegel of The Philadelphia Inquirer reports.
Johnson (illness) was traded from Buffalo to Philadelphia in exchange for a 2024 fourth-round pick Friday, according to Chris Johnston of The Athletic.
Johnson (illness) won't return for Thursday's game against Nashville, according to Mike Harrington of The Buffalo News.
Johnson (illness) will miss Wednesday's contest against Toronto, Paul Hamilton of WGR Sports Radio 550 reports.
Johnson (illness) won't play Sunday versus the Jets, Heather Engel of NHL.com reports.
Johnson (illness) will not play Saturday versus Vegas, according to Lance Lysowski of The Buffalo News.