• Left-hander Jeremy Horst allowed one hit, one run, one walk and struck out two in 1 1/3 innings Thursday. He has a 14.40 ERA this spring.
"He's not there yet," pitching coach Rich Dubee said. "He was better today with his slider. His fastball command, his angle to his fastball, isn't there yet. He was a slow starter last year. The competition [for three bullpen jobs] will begin here pretty soon. They still have to get some mound time to get comfortable, but Horst pitched outstanding for us last year. He and Chad Durbin, neither of them are there right now. Both of them have been notorious slow starters. They will get more reps as we get into it."
Dubee said the coaching staff will start paying a little closer attention to the results following Monday's day off.
• Closer Jonathan Papelbon, who was sick earlier in the week, will not pitch Friday as scheduled. He is scheduled to pitch Saturday instead.
"He threw a side today," Dubee said. "He's doing better, feeling healthier."
• Dubee said right-handers B.J. Rosenberg (sore right triceps) and Tyler Cloyd (stiff right forearm) are back on track after throwing bullpen sessions Thursday.
Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.