Leeds United are said to be taking a look at the former Feyenoord youngster.
Bokiej, who purports to work as a scout for Leeds and Manchester City's academies, claims the 21-year-old is auditioning with the Whites' under-23s and first team.
Previously on the books of Dutch giants Feyenoord, Miazek is currently without a club after leaving Chojniczanka Chojnice, according to the Polish website 90minut.
The website reported at the start of this month that the former Poland Under-19 was trialing at Leeds' Yorkshire rivals, Barnsley.
Andy Lonergan's performance in the Carabao Cup on Tuesday only highlighted Leeds' strength in depth between the sticks, with early first choice Felix Wiedwald and highly-rated pair Bailey Peacock-Farrell and Will Huffer also available to manager Thomas Christiansen.
The Whites added a plethora of young players to their academy ranks this summer, many of whom arrived from overseas, although goalkeeper was one of the few positions that wasn't addressed.
Were Miazek to sign for Leeds, he'd join compatriot Mateusz Klich at Elland Road.