Excerpts from his chat last Thursday:
Tom Boswell: If you want a one-hour "fun" project, go to baseball-reference.com or your fav site and look at the rotations of every team in '09. If you want to be even a close-to-.500 team (let alone good), you absolutely have to have three stable starting pitchers who can give you 600 innings with a 4.00-to-4.30 ERA.
By the way - for fun, I'll amend this post later, but I think it is closer to 50/50 on +.500 teams from 2009 that got 600 IP from 3 pitchers.
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Edit - Above .500 teams from / IP of top 3 pitchers > 600
NYY / yes (CC, AJ, Pettite)
Bos / No (Lester, Beckett, Penny - 547.1)
TB / yes (shields, garza, niemann)
MN / No (Blackburn, Baker, Liriano - 542.1)
Det / yes (Verlander, Jackson, Porcello)
LAA / No (Weaver, Saunders, Lackey - 573.1)
Tex / No (Millwood, Feldman, Holland - 526.2)
Sea / No (Hernandez, Washburn, Rowland-Smith - 468)
Phi / No (Blanton, Hamels, Happ - 555)
Fla / No (Johnson, Nolasco, Volstad - 553)
ATL / Yes (Vazquez, Jurrjens, Lowe)
St. L / Yes (Wainright, Pineiro, Carpenter)
CHC / No (Dempster, Lilly, Zambrano - 546.1)
LAD / No (Wolf, Billingsley, Kershaw - 581.2)
Col / Yes (Jimenez, Marquis, de la Rosa)
SF / Yes (Lincecum, Cain, Zito)
Score - 600+ = 7 (3 AL, 4 NL), < 600 = 9 (5 AL, 4 NL). I did not look at the ERAs. If you used a cut between 550 and 570 IP, two more teams would have had 3 innings horses. Also, this does not figure in Cliff Lee, who had the innings but spent most with Cleveland and Philadelphia. Still, his assertion that "If you want to be even a close-to-.500 team (let alone good), you absolutely have to have three stable starting pitchers who can give you 600 innings with a 4.00-to-4.30 ERA," is far from true.