The 2010 album Mojo marked the end of an eight year hiatus for Tom Petty and the Heartbreakers. The record's debut at #2 on the Billboard 200 CD listing served as a warm welcome back for the band.

It was Petty's intent to do a blues-based "jam"-style record. As such, he entered the project bringing only loose outlines of songs, allowing the songs to take shape during the recording sessions. In keeping with the informal feel, the album was recorded live off the floor at The Clubhouse, the band's Los Angeles rehearsal space.

"I Should Have Known It" was one of the tracks released as a single. One music reviewer summed up the song this way: "'I Should Have Known It'...is a gritty guitar romp that weaves Petty's raspy wail within the boggy sounds of bottleneck slides and a dense rhythm. The song eventually runs head first into a wildly entertaining solo that eventually reincorporates the entire band; the song is truly one of the best stompers from the Heartbreakers in a long time." (culturebully.com/tom-petty-heartbreakers-mojo-album-review)

The tab:
https://www.angelfire.com/planet/zerofret/vartab/pettytom-ishouldhaveknownit.txt

Video: https://www.youtube.com/watch?v=3_iBKacXIA4