The Pirates are no strangers to adding players and payroll at the deadline. They've added players in some form every year since 2011. The only time they've subtracted payroll was in 2016, with Ethan Hullihen doing the research.
https://twitter.com/EthanHullihen/status/1021453231707353089
This year was no different. The Pirates had a projected payroll of $86,903,024 heading into the deadline. Following the additions of Chris Archer and Keone Kela, they have a projected payroll of $89,127,523. That increase of just over $2.2 M isn't huge, but part of the appeal with Kela and Archer was that they were low-cost guys with years of control.