Based on pitchers who never pitched in a game they didn’t start (season by season).
## Linear mixed model fit by REML ['lmerMod']
## Formula: ND ~ RperG + ERA + IPperG + GS + TmWpct + (1 | playerID)
## Data: pitPlus
##
## REML criterion at convergence: 26062.9
##
## Scaled residuals:
## Min 1Q Median 3Q Max
## -3.7911 -0.6017 -0.0553 0.5757 7.0737
##
## Random effects:
## Groups Name Variance Std.Dev.
## playerID (Intercept) 0.2216 0.4707
## Residual 4.5853 2.1413
## Number of obs: 5914, groups: playerID, 1723
##
## Fixed effects:
## Estimate Std. Error t value
## (Intercept) 5.928023 0.368020 16.108
## RperG 0.325100 0.062705 5.185
## ERA -0.160407 0.010891 -14.728
## IPperG -0.966782 0.043404 -22.274
## GS 0.267594 0.003126 85.614
## TmWpct -1.878113 0.488493 -3.845
##
## Correlation of Fixed Effects:
## (Intr) RperG ERA IPperG GS
## RperG -0.466
## ERA -0.496 -0.076
## IPperG -0.690 0.079 0.561
## GS 0.288 -0.021 -0.076 -0.547
## TmWpct -0.215 -0.507 0.055 -0.072 -0.081