Johnston’s rookie arc is in focus as he competes for targets behind Keenan Allen. The coaching staff’s approach to WR depth, combined with Allen’s health and Rager’s push, will shape Johnston’s Week 1 role and fantasy trajectory.

Johnston sits in the Chargers’ rookie-WR echelon, a big-bodied option that KC will test against. His size and potential red-zone usage could be a focal point in Week 1 gameplanning and a key development to watch as KC’s young WR unit grows.

Johnston’s camo of big-play potential and camp energy signals a weapons upgrade with Allen. His connection with Herbert and his red-zone presence could unlock more scoring opportunities as the season unfolds and the line stabilizes.

Johnston’s concussion slows a promising rookie arc, with the offense needing his size and speed to widen the field. His health is a key variable in the rotation alongside McConkey and Allen, and the staff’s approach will shape his early-season target profile.

Johnston’s concussion scare creates a short-term vacuum in LA’s aerial attack, elevating secondary targets and testing long-term rookie confidence. If cleared, Johnston’s ceiling in an offense with Herbert remains intriguing, especially as early-season volume scales.