Not surprised you don't see the difference. GRod giving up 8 runs in 2 innings directly impacts the team. Holliday going 0-4 does not. There are 8 other guys scoring nearly 6 runs a game. Holliday is not costing the team losses.
Imagine if Gunnar's can of corn was a few inches higher, we would have had 3 homers in that game. We have a few guys holding their own (and then some).
It's not an apples-to-apples thing with pitchers. They can go down and work on mechanical issues and the results do not matter. If they are getting torched on the ML team, it causes losses. Holliday is not causing the team to lose.