Between each pitch, there are anywhere from fifteen to twenty seconds, sometimes longer, before the next pitch is delivered.
The pre-pitch routine, once an infielder becomes efficient at it, should only take about five seconds to complete. That leaves the infielder with about ten to fifteen seconds to clear his mind before getting ready for the next pitch.
It is very important to take that time to relax and keep the mind clear because if you think about anything else, whether it is a previous play or the last at-bat, your focus will be divided on the next play.
Not only will your focus be taken away, any negative thoughts about previous errors or bad at-bats will severely affect your future performance.
All good baseball players have short memories. The more you dwell on the past, the more likely it is to influence future plays.