Cecil Cooper said his plan is to give Matsui a day off every seven or eight days and Tejada a day off every ten or eleven days during the regular season.
Thinking about this, the season is about 180 days long. That means Matsui will play in about 135-140 games this season (barring anal fissures) and Tejada will play in 140-145 games (barring prison time or deportation). So there are 40 games available for the reserve infielder.