Related Clues:

• Pitcher's preoccupation
• Immeasurably long period of time
• Lengthy stretch
• Sports meas. of effectiveness
• NOW project
• Particular period
• The dead-ball ___
• Billion years
• Geologic time period
• Stat for a reliever
• Victorian --
• Prime period
• Geological spell
• B.C.E. concluder
• Noteworthy epoch