- Pace, Orlando
- Packer, Billy
- Padgett, Scott
- Page, Alan
- Pahlsson, Samuel
- Paige, Satchel
- Pak, Se Ri
- Palffy, Zigmund
- Palmeiro, Rafael
- Palmer, Arnold
- Palmer, Dan
- Palmer, Dean
- Palmer, Jim
- Palmer, Sandra
- Pandolfo, Jay
- Paniagua, Jose
- Papelbon, Jonathan
- Paquette, Craig
- Park, Chan Ho
- Park, Grace
- Parker, Anthony
- Parker, Frank
- Parker, Jim
- Parker, Larry
- Parker, Scott
- Parker, Steve
- Parker, Tony
- Parks, Cherokee
- Paronto, Chad
- Parrella, John
- Parris, Steve
- Parrish, Mark
- Parrish, Tony
- Parry, Craig
- Parry, Josh
- Pass, Patrick
- Passmore, Steve
- Pate, Jerry
- Pathon, Jerome
- Patrick, Ben
- Patrick, Danica
- Patten, David
- Patterson, Danny
- Patterson, Eric
- Patterson, Gerald
- Patterson, Ruben
- Paul, Josh
- Paulson, Dennis
- Pause, Logan
- Pavin, Corey
- Payne, Jim
- Payne, Kevin
- Payton, Gary
- Payton, Jay
- Payton, Walter
- Pederson, Doug
- Peeler, Anthony
- Peete, Rodney
- Pelfrey, Mike
- Peltonen, Ville
- Penders, Jim
- Penningon, Chad
- Pennock, Herb
- Peoples, David
- Pepper, Dottie
- Percival, Troy
- Perdue, Will
- Perez, Joe
- Perez, Neifi
- Perez, Odalis
- Perez, Oneli
- Perez, Orlando
- Perez, Timo
- Perez, Tomas
- Perez, Tony
- Perkins, Sam
- Perreault, Yanic
- Perry, Chris
- Perry, Craig
- Perry, Ed
- Perry, Fred
- Perry, Gaylord
- Perry, Herbert
- Perry, Jason
- Perry, Joe
- Perry, Kenny
- Perry, Todd
- Person, Robert
- Person, Wesley
- Pesky, Johnny
- Peter, Christian
- Peterson, Adrian
- Peterson, Julian
- Peterson, Katie
- Peterson, Mike
- Peterson, Morris
- Peterson, Scott
- Peterson, Todd
- Petitgout, Luke
- Petrick, Billy
- Petrovic, Tim
- Pettinger, Matt
- Petty, Richard
- Phelps, Michael
- Phelps, Travis
- Phenix, Perry
- Philippoussis, Mark
- Phillips, Chris
- Phillips, Jerry
- Phillips, Ryan
- Piatkowski, Eric
- Piazza, Mike
- Pichardo, Hipolito
- Pie, Felix
- Pierce, Antonio
- Pierce, Mary
- Pierce, Paul
- Pierre, Juan
- Pierzynski, A.J.
- Pignatiello, Carmen
- Piniella, Lou
- Pinkston, Todd
- Pippen, Scottie
- Pisetsky, Vitaly
- Pistorius, Oscar
- Pittman, Kavika
- Pittman, Michael
- Player, Gary
- Player, Scott
- Pleasant, Anthony
- Plesac, Dan
- Plotkin, Brian
- Plummer, Jake
- Poapst, Steve
- Poindexter, Anthony
- Polanco, Placido
- Polite, Lousaka
- Polk, Carlos
- Pollard, Marcus
- Polynice, Olden
- Ponikarovsky, Alexei
- Ponson, Sidney
- Poole, Nate
- Poole, Tyrone
- Pooley, Don
- Pope, Daniel
- Pope, Eddie
- Pope, Marquez
- Pope, P.J.
- Porcher, Robert
- Porter, Alvin
- Porter, Bill
- Porter, Chris
- Porter, Daryl
- Porter, Jerry
- Porter, Joey
- Porter, Terry
- Posada, Jorge
- Posey, James
- Poti, Tom
- Potvin, Felix
- Powell, Carl
- Powell, Jay
- Pratt, Todd
- Prentice, Travis
- Price, Nick
- Price, Peerless
- Prideaux, Brandon
- Primeau, Wayne
- Prince, Tom
- Prinz, Bret
- Prioleau, Pierson
- Pritchett, Stanley
- Probert, Bob
- Proehl, Ricky
- Profit, Laron
- Prokopec, Luke
- Pronger, Chris
- Prospal, Vaclav
- Pryce, Trevor
- Przybilla, Joel
- Puckett, Kirby
- Pujols, Albert
- Purdy, Ted
- Purtzer, Tom
- Pyatt, Taylor