Lamb, 24, played in 3 rehab games with Triple-A Reno, going 4-for-11 (.364) with 1 double and 2 RBI. In 10 games with the D-backs prior to his injury, he was hitting .414 (12-for-29) with 3 doubles, 1 triple, 1 home run, 9 RBI and a 1.204 OPS. Pacheco, 29, batted .242 (16-for-66) with 2 home runs and 8 RBI in 29 games with the D-backs this season.
Lamb missed about seven weeks with the injury, during which time third-base was occupied mostly by Yasmany Tomas, with Aaron Hill and Cliff Pennington also getting starts at the hot-corner. With the departure of Mark Trumbo, this frees a spot up for Tomas in the outfield, and it's expected that Lamb will be the everyday third-baseman. Pacheco became surplus to requirements after the arrival of Welington Castillo, who will be splitting the catching duties with Jarrod Saltalamachia.
Further roster moves are likely as we go forward, with the next likely being the return of David Hernandez to the active roster, which could happen early next week.