Cal Raleigh is called "Big Dumper" because of his notably large backside. The nickname was originally coined by his former Mariners minor league teammate Jarred Kelenic, who playfully referred to Raleigh's butt whenever Raleigh assumed his catching position. The nickname stuck and has become a beloved and fitting part of Raleigh's identity, especially as he gained national attention for his powerful hitting in MLB. Despite Raleigh's mother not being fond of the nickname, it has been fully embraced by fans and the Mariners organization, including merchandise and promotions celebrating it.
