In proffessional baseball, is the [restricted list] considered a part of the DL[disabled list]?

Answer 1

It's entirely separate, and for a number of reasons.

The restricted list is a way to punish a player for some type of irresponsible behaviour, depending the team policy. A player on the restricted list cannot play, cannot be traded, and is not paid.

A player is played on the DL for health reasons. This could be injury, illness or some type of personal or family situation that requires more time than the 7-day bereavement list allows. This could be anything from a muscle pull that requires the full 15 days or more for recovery and rehab, to season-ending surgery to a Zach Greinke-type situation, in which a player is on the DL for the whole season, in order to sort out a problem that keeps him from being able to play or to play properly. A player would also be on the DL if he were to volunteer that he has a substance abuse problem and goes to rehab during the season. (See Jeff Musselman, 1989.) A player on the DL is still paid, although for some players, some or all of the dollar value of their contract has been insured by the organization.

Answer 2

No. The restricted list is separate, and is composed of players that are still under a team's control but who are suspended, usually for contract violations such as leaving the team without permission; I think those suspended for drug and steroid use are also put on the restricted list. Restricted players are not paid, but are still under the team's control.