Berggren scored a goal on two shots in Thursday's 2-1 win over the Islanders.
Berggren scored a goal on three shots in Wednesday's 3-2 overtime win over the Penguins.
Berggren signed a one-year, $825,000 contract with Detroit on Monday.
Berggren was loaned to AHL Grand Rapids on Monday.
Berggren was recalled from AHL Grand Rapids on Saturday.
Berggren was reassigned to AHL Grand Rapids on Saturday.
Berggren was promoted from AHL Grand Rapids on Tuesday.
Berggren was sent to AHL Grand Rapids on Friday.
Berggren was elevated from AHL Grand Rapids on Monday.
Berggren was reassigned to AHL Grand Rapids on Friday.