The pitcher performance levels between Leon and Swihart and Vaz and Swihart are frighteningly significant in almost all cases involving our starters.
Those who want to dump Leon and make Swihart the back-up should be prepared to defend that choice by showing his offense projects to make up the difference.
The differentials between Leon and Vaz are less significant, but with Sale one could argue, it's worth keeping Leon just as Sale's personal caddy alone.
Career ERA for Sale with....
Leon 2.42 (319 IP)
Vaz 3.40 (53 IP)
Swihart (Zero IP with Blake)
Price did well with Vaz this post season, but here are the career numbers:
2.83 w Leon (194 IP)
4.32 w Vaz (263 IP)
5.73 w Swihart (11)
Porcello:
4.14 w Leon (483)
4.15 w Vaz (134)
4.59 w Swihart (118)
ERod
4.00 Leon (99)
4.08 Swihart (71)
4.24 Vaz (276)
Wright
3.35 Vaz (97)
4.06 Swihart (71)
5.59 Leon (56)
I guess one could argue Swihart would be okay with ERod and Wright and maybe Porcello as well, so if used correctly, he would not hurt the staff that much, but if you take away Leon from these trends, you should expect significant declines from Sale and Price, even if only Vaz catches them.