Table 2.

Effect of travel direction on the impact of jet lag on home offensive performance

Home jet lag
OffenseWestWest P valueAverageEastEast P value
At-bats0.218 ± 0.1380.11333.497 ± 0.019−0.141 ± 0.160.38
Singles0.047 ± 0.0880.70356.017 ± 0.012−0.01 ± 0.1030.46
Doubles−0.015 ± 0.0450.3691.769 ± 0.006−0.146 ± 0.0530.003*
Triples−0.003 ± 0.0150.42950.205 ± 0.002−0.031 ± 0.0180.037*
Home runs0.001 ± 0.0350.5251.033 ± 0.005−0.01 ± 0.0410.4
Walks0.054 ± 0.0710.7773.435 ± 0.0100.028 ± 0.0830.6345
Strikeouts0.057 ± 0.0890.25956.202 ± 0.013−0.05 ± 0.1030.686
Stolen bases−0.04 ± 0.0310.09950.634 ± 0.004−0.062 ± 0.0360.0425*
Caught stealing−0.032 ± 0.0170.97250.262 ± 0.002−0.002 ± 0.020.531
Stolen base attempts−0.072 ± 0.0360.022*0.896 ± 0.005−0.063 ± 0.0410.0635
Sacrifice hits−0.008 ± 0.020.3490.348 ± 0.0030.01 ± 0.0230.674
Sacrifice flies−0.011 ± 0.0180.26850.295 ± 0.0030.002 ± 0.0210.5455
Grounded into double plays0.032 ± 0.0280.12350.762 ± 0.0040.062 ± 0.0320.0285*
  • Home jet lag shows regression coefficients indicating effects on home offensive performance. Regression coefficients are adjusted for team effects. Parameters are expressed on a per-game basis with error indicating SE of the estimated effect. P values are one tailed, derived from the regression analysis testing whether jet lag adversely impacts performance.

  • * Metrics where P < 0.05. Average is over all 46,535 games.