▁accum ulation ▁of ▁momentum ▁that ▁if ▁concentr ated ▁would ▁have ▁an ▁ir res ist ible ▁force ▁capable ▁of ▁cr ushing ▁a ▁batt les hip ▁or ▁of ▁pul ver izing ▁a ▁back stop ▁construction ▁of ▁Har vey ized ▁steel ▁arm or ▁plate ." ▁ ▁In ▁ 1 9 0 7 , ▁newsp apers ▁across ▁the ▁country ▁published ▁an ▁x - ray ▁of ▁Mc Gu ire ' s ▁left ▁hand ▁( p ict ured , ▁above ▁at ▁right ), ▁showing ▁" 3 6   break s , ▁tw ists ▁or ▁b umps ▁all ▁due ▁to ▁baseball ▁acc idents ." ▁The ▁text ▁accomp any ing ▁the ▁widely ▁published ▁photograph ▁noted : ▁" When ▁the ▁picture ▁was ▁developed ▁the ▁photograph er ▁was ▁amaz ed ▁to ▁see ▁the ▁kn ots , ▁like ▁g nar led ▁places ▁on ▁an ▁old ▁o ak ▁tree , ▁around ▁the ▁joint s , ▁and ▁numerous ▁sp ots ▁showing ▁old ▁breaks . ▁In ▁several ▁joint s ▁the ▁b ones ▁are ▁fl atten ed ▁and ▁pushed ▁to ▁the ▁side ." ▁ ▁Career ▁statistics ▁and ▁records ▁Despite ▁the ▁inj uries ▁and ▁physical ▁dem ands ▁of ▁a ▁catch er ' s ▁duties , ▁Mc Gu ire ▁showed ▁remarkable ▁lon ge vity . ▁In ▁ 2 6 ▁years ▁in ▁the ▁major ▁le agues , ▁Mc Gu ire ▁compiled ▁a ▁. 2 7 8 ▁career ▁batt ing ▁average , ▁. 3 4 1 ▁on - base ▁percentage ▁and ▁. 3 7 2 ▁sl ug ging ▁percentage . ▁He ▁appeared ▁in ▁ 1 , 7 8 1 ▁games ▁and ▁tot