Aerosmith has added two more concerts to their list of postponed shows that now totals seven due to an unspecified injury suffered by lead vocalist Steven Tyler.

New postponements of their July 11 concert at the Ford Amphitheatre in Tampa, FL, and July 13 show at the BankAtlantic Center in Sunrise, FL, join five previously announced postponements on July 1 at Riverbend Music Center in Cincinnati, OH; July 3 at Hershey Park Stadium in Hershey, PA; July 5 at the Verizon Wireless Amphitheater in Virginia Beach, VA; July 7 at Time Warner Cable Music Pavilion in Raleigh, NC; and July 9 at Verizon Wireless Amphitheatre Charlotte in Charlotte, NC.

Rescheduled dates are expected to be announced soon. All tickets for the originally scheduled concerts will be honored at the rescheduled shows.

In addition to these new postponements, drummer Joey Kramer was forced to postpone his scheduled July 12 signing of his book, “Hit Hard: A Story of Hitting Rock Bottom at the Top.” The book signing will also be rescheduled when new Florida dates are set.

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Guitarist Brad Whitford is back on board after recovering from an earlier surgery; he will now have to wait until the band’s next scheduled concert on July 15 at Lakewood Amphitheatre in Atlanta, GA, to hit the stage.