probably not. neither guy helps you in wins, sometimes a reliever has fluke year with lots of wins but theres absolutely no way of predicting who that will be, wins are random enough for starters, for relievers they are almost a total crapshoot. dotel, as long as he is the closer, will help you in saves (which linebrink won't), both should help your era/whip a little or at least not hurt it. they should be about equal in k's as well. so as long as dotel is picking up saves he's more valuable, if dotel stops getting saves you should try to find a new closer, if you cant do that only then would i go to a middle reliever (who are dead weight in 2 of 5 pitching categories and only marginally helpful in the other 3 do to their limited innings)