Multiple reports say 49ers running back Christian McCaffrey reacts positively to rookie tailback Kaelon Black during training camp. According to coverage, Black has not yet appeared in an NFL game but is already making an impression on veteran teammates. After Wednesday’s practice, McCaffrey is asked about the rookie and responds with praise, describing Black as “stacked.” The accounts add that McCaffrey says Black’s preparation and playmaking ability are noticeable and that he appears to have performed at a high level previously. The reports frame McCaffrey’s comments as an early indication of how the rookie is integrating with the team’s established players during offseason practices. While the sources focus on the veteran’s reaction and the rookie’s early camp performance, they do not provide details about any game-related statistics, injuries, or roster moves. The agreement across outlets centers on McCaffrey’s upbeat assessment of Black and the idea that Black’s work at camp stands out to the 49ers’ offensive group.