CREATE TABLE table_21158 ("Player" TEXT, "GP" FLOAT, "K. Ret." FLOAT, "KR Yds" FLOAT, "KR Avg." TEXT, "KR TD" FLOAT, "KR LG" FLOAT, "P. Ret." FLOAT, "PR Yds" FLOAT, "PR Avg." TEXT, "PR TD" FLOAT, "PR LG" FLOAT, "MFG Ret." FLOAT, "MFG Yds" FLOAT, "MFG Avg." TEXT, "MFG LG" FLOAT, "MFG TD" FLOAT)

What is the pr avg, when kr lg is 49?
SELECT "PR Avg." FROM table_21158 WHERE "KR LG" = '49'
SELECT "PR Avg." FROM "table_21158" WHERE "KR LG" = '49'