Guys like Duan and @
osick87 signee Pedro Martinez used to go unsigned and I scoop them up as MLFA. Many times I'd use them on my UBL/WBL teams in defensive specialist roles and hope they were LH too so I could give my starters some rest too. Now more teams are getting these type of guys so you can use your roster 1-25 instead of having just shitty back up MIFs who can't do anything but just fill in if someone gets hurt.
I actually have a lot of these type guys coming through my system. I've picked up a couple UDFA and MLFA's who can fit these roles for me in future years so I can save a little cash.