What position is used to determine type a and b status?  Is it the position that a player has listed as his main position, or is it the position that he plays most at, or something else?

As I understand it, it only takes into account overall rating.  I wasnt sure about the position though.

from the FAQ:

During each offseason (after the world rolls over), players are ranked within their position group. These groups include C, 1B/OF/DH, 2B/3B/SS, SP and RP. Any free-agent in the top 20% of their position is considered a Type A free-agent and any free-agent in the top 40% is considered a Type B free-agent. If another team signs a Type A free-agent prior to the Amateur Draft preparation period, the player's former team receives compensation. The former team receives the signing team's first round pick (or second round pick if the pick is one of the first 16 picks). If it's a Type A or a Type B free-agent, the former team receives a supplemental pick between the first two rounds of the draft. Also when the Amateur Draft preparation period is reached , the supplemental round picks will be re-ordered so that each eligible franchise has at least one pick before they have an additional pick.

Right, that doesnt really answer my question.  If I have a guy listed at C but he plays every game at DH is he ranked as a catcher or a DH?

The groups also seem a bit flawed as I would want my CF to be grouped with 2b/3b/ss and not with 1b/lf/dh.  The same question would apply, what if a guy I have listed as a 2b plays every game in CF..?

From my understanding, it does not matter one bit where the player actually played in the game, the sim uses fielding ratings and groups them as to where it thinks the player should have been playing, or is best suited for based on current ratings

''Any free-agent in the top 20% of their position is considered a Type A free-agent and any free-agent in the top 40% is considered a Type B free-agent.''

Are you sure its based on OVR rating and not stats?

It's definitely OVR. They do not factor in stats at all.

In one of the dev chats, they said that it's where the AI groups the players in a position, not where the owner puts them.

Posted by oriolemagic on 7/29/2010 4:30:00 PM (view original):
The groups also seem a bit flawed as I would want my CF to be grouped with 2b/3b/ss and not with 1b/lf/dh.  The same question would apply, what if a guy I have listed as a 2b plays every game in CF..?

CF should be grouped with MIF. Their defense drives up their overall, so they shouldn't be compared with 1B. A great hitting 1B usually won't be a Type A.