From the episode

This is at the Browns building. That's Denzel Boston on the left and the rookie Casey Concepcion on the right. They are shadow boxing in the locker room in front of the media there before press conferences.

STACKED’s take

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Boston and Concepcion are close teammates engaging in locker room activities.

Denzel Boston, a Browns player, was observed shadow boxing with rookie Casey Concepcion in the locker room before press conferences; the two are noted as nearly inseparable off the field and do everything together in the community.

Denzel Boston headshotDenzel BostonWR · CLEPlayer page — value, ADP, projections, and every insight