Morris agreed to a contract with the Mavericks on Saturday, Shams Charania of The Athletic reports.
Morris chipped in two points (1-6 FG, 0-4 3Pt), two rebounds and one block across 14 minutes during Friday's 107-89 loss to the Pistons.
Morris produced two points (1-1 FG) across five minutes during Monday's 127-92 win over the Bulls.
Morris (illness) is available for Sunday's game against Minnesota, Mark Followill of Bally Sports Southwest reports.
Morris (illness) is listed as questionable for Sunday's game versus the Timberwolves.
Morris (illness) has been ruled out for Friday's game against the Trail Blazers, Tim MacMahon of ESPN.com reports.
Morris is questionable for Friday's game against Portland due to an illness, Grant Afseth of SI.com reports.
Morris (illness) is available for Sunday's game against Charlotte.
The Mavericks list Morris (non-COVID-19-related illness) as questionable for Sunday's game against the Hornets.
Morris is questionable for Friday's game against the Nuggets due to a non-COVID illness.