Wakefield confirmed on Friday that they have signed Paul Johnson from St Helens while at the same time releasing his namesake to Crusaders.
The incoming Paul Johnson is the former Saints reserve prop or back-row forward, who has signed on a two-year contract.
The 22-year-old former Blackbrook amateur played for Championship club Whitehaven on a dual-registration this year but also made two Super League appearances.
Wildcats head coach John Kear said: "We've had our eye on Paul for quite some time and we've been following his progress keenly.
"We're assembling a squad based mainly around young players who have the drive and hunger to succeed at Super League level and Paul certainly fits that bill."
The second Paul Johnson, a second rower who formerly played for Wigan, Bradford and Warrington, has joined Crusaders after he was not offered a new contract by the Wildcats.