Most expensive baseball sold at auction

- Who
- Todd McFarlane, Mark McGwire's 70th home run ball
- What
- 3,054,000 US dollar(s)
- Where
- United States (New York City)
- When
- 12 January 1999
The most expensive baseball sold at auction is Mark McGwire's 70th home run ball, which sold for $3,054,000 (£1,873,620; €2,654,500), including commission, to Todd McFarlane (USA) at Guernsey's auction house, New York, USA, on 12 January 1999.
The ball was hit by Mark McGwire of the St Louis Cardinals for his 70th and final home run in his record-setting season in 1998.