What happened: Interim manager Andy Green announced Tong's assignment after Friday's 10-6 win over the Giants. The right-hander earned another call-up after rebounding from a difficult stretch in the minors.

Why it matters: The move brings another young arm into a rotation trying to sustain a postseason push. It also gives the front office a September test of whether Tong's minor-league reset translates against major-league hitters.

What to watch: Tong is scheduled to face Miami in the series opener. His workload and command will be the immediate markers in his return.