I always draft for catchers arm if I can help it. 1970 Munson or 1964 Roseburo's are my favorites for 80m leagues. Their offense is good, and defense is phenomenal.
An example of what Just4me was referring to, in an OL we're in together, another team has thrown out 36% of baserunners. 82 of 228. That's a great %, but means he's still allowed 146SB.
My team has Roseburo's A++ arm, and he's catching base stealers at a 44% clip. He's caught 28 of 64, which means he's only allowed 36SB. That's 110SB difference in 90 games.
While I don't know the exact stats and how many runs those base stealers led too, I'd rather pay a small premium for Roseburo's arm than allow 110 more SB with a B+ arm.