Rick had a belly that he could pull some reserve out of when he needed the extra power. I think it's a combination of things. The small strike zone, can't throw inside, batters are more patient now, and the fact that if something hurts now players see that their future money may go away so the slightest ache they are more careful than before. I'm curious on how many pitches Rick threw a game because if memory serves me he had pretty good control or the very least didn't have to throw as many pitches per game with that sinker of his. I would also submit that pitchers have to work much harder to get guys out now than they did in the 70's and points previous. Your average MLB hitter is stronger and quicker at the plate than your average 1975 era hitter. Agreed, as OBP has become more important in the mind of some organizations, the amount of pitches per plate appearance has probably risen over the years. Also with the advent of the 5 man rotation and the amount of money invested in these guys they don't throw as much as they used to. In the past, and with fewer teams in the league, most pitchers threw a lot more innings in the minors where they either persevered or flamed out, so their probably were a lot more guys with injuries, they were just out of baseball before they ever made it to the bigs. With expansion and the dilution of pitchers you are seeing guys in majors that probably would have never made it in years past. But add to the expansion the fact that there are so many more players to pick from (population wise) and now it's more world wide I don't think expansion has hurt as much as it seems.