Bat tracking data begins at the All-Star Game 2023, data from that year is therefore partial. Bat tracking data does not cover 100% of swings. It will only include tracked swings in Statcast equipped ball parks.
Qualified players are based upon the player with the most swings in the given leaderboard. You may see players show up on leaderboards with specific filters (e.g. "Breaking", or "Red Sox - Offspeed") but they do not qualify on more general leaderboards (e.g. "Overall").
Team data represents only pitches that the pitcher induced a swing or the batter swung at while they were on the given team.
