Santana has started 207 games. 49th amongst all active MLB pitchers in games started. He has given up 174 HRs. If you take those 49 pitchers and the calculate the HR/GS, Santana comes in at #7 with .84HR per GS. What gems is he on the list with?
All .500 win percentage pitchers. So while 4 HRs one one game is excessive, dude give up a lot of HRs period.
This is my nerdy way of saying he sucks and I am sick of seeing him trotted out there.