Escobar has 428 PA vs. Hardy's 270 PA's this season. Someone would have to make up the Hardy missed games and it would have been Escobar getting called up. Thier OBP's are pretty much identical. The only difference is in slugging. Hardy has 104 total bases in 270 PA's and Escobar has 147 TB in 428 PAs. So if you rate Escobar down to Hardy's lower PA's he would have 12 few bases than Hardy in 270 PAs or if Hardy had the same PA's as Escobar and kept his slugging up that would be 17 more bases than Escobar. Of course Hardy is as slow as can be and wasn't the greatest base runner so I would also remember an earlier post someone referenced Escobar scoring from 1st or 2nd when you know Hardy wouldn't have. Escobar also has 10 steals with 4 caught for a net of 6. Hardy is at 0 with one CS and 1 steal. Even giving Escobar something like .66 of a base for his net steals subtracts about 4 bases from that 17 base deficit. All in all given the negligible difference in OBP, basically a 13 base difference in slugging, and better scoring from 1 or 2nd, and just the sheer number of games missed by Hardy I would say their offense is pretty much a wash or even slighly favors Escobar because of the durability and the fact he would have been playing anyway. I don't know why your going through all this work to figure out the value of these players, when all the factors you mention are included in the formula for WAR, except their formula is properly weighted. WAR shows Hardy as more than twice as valuable as Escobar this year. Hardy has been almost 4 times more valuable than Gomez. Gomez is awful. Beyond awful. Not really