<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2008) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2008) (Learn how and when to remove this template message) </Td> </Tr> <P> In baseball, middle relief pitchers (or "middle relievers") are relief pitchers who commonly pitch in the fifth, sixth, or seventh innings . In the National League, a middle reliever often comes in after the starting pitcher has been pulled for a pinch hitter . A middle reliever is usually replaced in the eighth or ninth innings by a left - handed specialist, setup pitcher or closers; middle relief pitchers may work these innings as well, especially if the game is not close . </P>

What does lrp and mrp mean in baseball