pbp

Play by play data, accessed with nflreadr::load_pbp()

nextgen_stats

NFL Next Gen Stats data, accessed with nflreadr::load_nextgen_stats()

injuries

Injuries data, accessed with nflreadr::load_injuries()

depth_charts

Depth chart data, accessed with nflreadr::load_depth_charts()

combine

NFL Combine Data courtesy of PFR, accessed with nflreadr::load_combine().

You may also be interested in tanho63/nfl_combine for the (manual) nfl.com data version, which might eventually get moved into this release if we can automate it.