Lincoln arrives from The Kia Forum following the promotion of Rich Best to Live Nation's global concert team.
Singer Will Toledo's band has also pulled out of the When We Were Young festival.
Gigs in North Carolina, South Carolina and Florida have been iced after Josh Kiszka ruptured his eardrum.
The British singer-songwriter hits 250 shows of his final tour, with about 50 more to go.
Haitian band Boukman Eksperyans will take his place.
Brian Tarney and Liz Garo from Spaceland Presents hope to find their groove with the new company, which is also producing a forthcoming New York music event called Flesh & Steel.
Under the deal, Marcus Allen and Brandon McEachern join Live Nation Urban in executive roles.
Following My Chemical Romance's come-back tour and Live Nation's upcoming When We Were Young festival, pop-punk could be as big a business ever.
Magrew will focus on new venue development, event marketing, strategic partnerships, ticket inventory management and more in his new role.
The singer had a handful of dates left on the "Home, Before and After" tour.
