Each active batter position on your roster has a limit for maximum number of games played. Your entire pitching staff has a cumulative limit for total innings pitched.
Players on your bench don't contribute to these limits, and limits are not counted for individual players (just starting positions).
This table tracks how many of each you have used, how many you have remaining, your projected pace and the maximum allowed.
Once you exceed a maximum, you will no longer accumulate stats at that position.