"[2] Tom Callahan of Blurt added, "Castro has a soulful voice, searing guitar and is an excellent songwriter and vocalist.

Castro was also an early adopter of the internet's new graphical web browsers to promote his music.

Castro has released albums on the Telarc, 33rd Street and Heart And Soul and most recently on the Alligator label, as well as on Blind Pig.

In 2009, Castro joined the roster of Chicago's Alligator Records with his release Hard Believer, produced by John Porter.

[10] In 2011, Castro stripped down his band to a four-piece unit called the Painkillers with bassist Randy McDonald from the original Tommy Castro Band, keyboardist James Pace and original Painkillers drummer Byron Cage.

2013's The Devil You Know, was recorded with this line-up plus guest appearances by Marcia Ball, Tab Benoit, Joe Bonamassa, The Holmes Brothers, and Magic Dick.

This album is full of the blues, but it's also like a full-charged blue-eyed R&B and soul review, making this one of Castro's finest releases.

"[12] In 2015, recording with long-standing bassist Randy McDonald, keyboard player Mike Emerson (Elvin Bishop, Carlene Carter,[13] James Armstrong, Petty Theft), and drummer Bowen Brown he released, Method To My Madness,[14] which debuted at number four in the Billboard Blues Albums Chart.

[15] On September 29, 2017, he released Stompin' Ground (Alligator) again with Painkillers' bassist Randy McDonald, keyboardist Mike Emerson and drummer Bowen Brown.