Smith-Njigba's contract was selected by the Pirates on Friday.
Smith-Njigba was promoted to Triple-A Indianapolis late in the 2021 season and will now join the 40-man roster to protect him from the Rule 5 draft. He made 73 appearances between the Double-A and Triple-A clubs last year and hit .254 with six home runs, 42 RBI, 36 runs and 13 stolen bases.