This timeline is obviously incomplete, but it's what I have right now.

Tech Timeline
1930 - Tech I becomes Tech's first live bulldog mascot.
1931 - Tech I survived getting hit by an automobile.
1932 - Tech I died from an accident that caused internal hemorrhages.
1934 - Tech II was presented.
1935 - Tech II died after getting hit by an automobile.
1936 - Tech III was raised.
1939 - Tech IV was presented.
1949 - Tech IX was presented.
1951 - Tech IX died of a heart attack.
1951 - Tech X was purchased.
1956 - Tech X died.
1956 - Tech XI was presented.
1957 - Tech XI was stolen by NWST.
1970 - Tech XIII was presented.
1972 - Tech XIII died of heat exhaustion.
1972 - Tech XIV arrived.
1980 - Tech XV arrived from Starkville.
1984 - Tech XV died of leukemia.
? - Tech XVI was retired because caretakers moved and took the bulldog with them.
2001 - Tech XVII's last year as mascot. Don't know what happened to him.
2001 - Tech XVIII makes his debut.
? - Tech XVIII was retired because caretakers moved and took the bulldog with them.
2007 - Tech XIX was retired after surviving a heat stroke.
2008 - Tech XX was presented.
2012 - Tech XX died of a heat stroke after a vet worker left him outside.