ive ▁wear ▁and ▁te ar ▁on ▁a ▁grass ▁playing ▁field , ▁baseball ▁clubs ▁were ▁not ▁keen ▁to ▁see ▁football ▁played ▁in ▁their ▁par ks ▁throughout ▁the ▁entire ▁baseball ▁season . ▁Thus , ▁the ▁need ▁to ▁use ▁ball par ks ▁played ▁a ▁large ▁part ▁in ▁ens uring ▁that ▁the ▁National ▁Football ▁League ▁and ▁early ▁riv als ▁would ▁delay ▁the ▁start ▁of ▁their ▁seasons ▁until ▁September ▁when ▁the ▁baseball ▁season ▁was ▁w inding ▁down , ▁thus ▁aff ording ▁baseball ▁teams ▁the ▁exclusive ▁use ▁of ▁their ▁facilities ▁in ▁the ▁spring ▁and ▁summer . ▁ ▁Starting ▁in ▁the ▁ 1 9 5 0 s , ▁a ▁number ▁of ▁techn ological ▁changes ▁and ▁tr ends ▁eventually ▁caused ▁some ▁to ▁question ▁the ▁traditional ▁timing ▁of ▁the ▁American ▁football ▁season . ▁In ▁particular , ▁football ▁became ▁a ▁much ▁more ▁luc r ative ▁sport , ▁the ▁in vention ▁of ▁artificial ▁tur f ▁and ▁develop ments ▁in ▁the ▁growth ▁and ▁maintenance ▁of ▁natural ▁grass ▁made ▁it ▁more ▁practical ▁for ▁baseball ▁and ▁football ▁to ▁be ▁played ▁at ▁el ite ▁levels ▁in ▁the ▁same ▁facility ▁at ▁the ▁same ▁time , ▁and ▁the ▁increasing ▁influence ▁of ▁television ▁combined ▁with ▁the ▁pre val ence ▁of ▁a ▁farm ▁system ▁in ▁which ▁Major ▁League ▁Baseball ▁controlled ▁the ▁rights ▁to ▁baseball ▁levels ▁in ▁all ▁levels ▁of ▁play ▁caused ▁many ▁minor ▁league ▁baseball ▁clubs ▁( some ▁of ▁whom ▁played ▁in ▁large ▁facilities ▁that ▁could ▁be ▁easily ▁re - pur posed ▁for ▁major ▁league ▁football ) ▁to ▁be ▁much ▁less ▁luc r ative ▁in ▁their ▁own ▁right . ▁ ▁It ▁was