Over the weekend, Guillen accused Harper of using too much pine tar on his bat. The Nationals won 4-0 and Guillen called Harper of unprofessional after he retaliated and pointed to his bat in his second-plate appearance.

Despite Harper offering no comment, Nationals Adam LaRoche further instigated the fued. LaRoche asked Harper to autograph a bat and later addressed it to Guillen with pine tar smeared all over it.

Guillen found humor in the gag gift telling reporters, “It was funny. I’ve got a few friends on their side. All those guys were making fun of me. I found out later they made the kid sign the bat.’”