Smokey and I teamed up to publish NL-Only and AL-Only position rankings for those of you in "only" leagues. They aren't as popular as mixed leagues, but I play in more "only" leagues than mixed leagues, and always have. I think "only" leagues require you to do a bit more homework to find that corner infielder or 4th-5th outfielder who could end up playing everyday.
I recently updated my NL-only league rankings where all of the position rankings appeared in the Hitter Rankings link below, and of the starting pitcher and reliever rankings appear in the Pitcher Rankings link below.
The AL-only league rankings appear as originally published.
NL-Only Position Rankings
AL-Only Position Rankings
First Base: AL
Second Base: AL
Third Base: AL
Starting Pitchers: AL
If you are looking for more AL/NL-only league rankings, there is only one spot on the internet that is home to all the rankings you will ever need - Fantasy Rundown. They provide links to all the other fantasy baseball sites everyday for one-stop shopping. Check them out.